(
I.,n r.,{.5 )
What is the average speed of the trolley for the
interval shown?
0.5 cm s-1
20 cm s-l
A
C
9.
B
D
12 cm s-1
125 cm
s-l
(
A basketball is thrown vertically downwards with
a speed of 10 m s-r at a height of 8 m from the
ground and rebounces. Which of the following
graphs correctly represents the relation between
the speed of the ball and time?
A
speed
B
speed
A
car rolls down a sloping runway and reaches a
smooth flat surface (see diagram below).
6.
c
Which of the following velociry-time graph best
illustrates the motion of the car?
D
10.
Which of the following is the velocity-time
graph of an object moving with decreasing
acceleration?
7. A
helicopter is moving horizontally at a speed
of 180 km h{. It then accelerates uniformly at
2 m s-2 for 10 seconds. Find the final speed of the
A-.u.
helicopter.
.
8.
A
C
50ms-l
200 m s-l
B 70ms-l
D 668ms-1, (
A ticker tape timer vibrates
)
at 50 Hz. The tape in
the diagram shows the distance moved by a trolley.
1cm
2cm
*++g++@+
Cv
B
v
11.
L4.
speed of 10 m
s-1.
What is the acceleration of the
ball one second after leaving the
A
B
C
D
girlt
hand?
0ms-2
5 m s-2downwards
10 m s:2 downwards
10 m s-2upwards
v/m
t2. Which of the following velocity-time graphs
shows the motion of an object in free fall in the
absence of air resistance?
Av
An object is launched vertically upwards into the
air and its velocity-time graph is shown below.
s-i
.
Bv
What is the maxim.r- tirpl"..ment made oy
the object?
A
C
B
D
30m
120m
60m
240m
a15.r The diagram shows thevelocity
for the motion of a body.What
in the first 5.0
s?
I
)
13.
A
parachutist falls for 1 minute before his
parachute opens. Which graph best describes
how his speed varies with time?
A
speed
B
1 minute
C speed
speed
1 minute
D
A
C
speed
4.0m
7.5m
B 6.0m
D e.Om
(
t6. Below is a graph showing the motion of a
Which of the following is true?
1
minute
1 minute
()
velocity/m s-l
Iime/s
)
car.
A
B
C
D
The
The
The
The
79. A rocket is launched vertically and the velocitytime graph is obtained as shown below. The
acceleration is constant all the time.
velocity is constant all the time.
car is moving all the time.
car moves after 7
seconds.
(
maximum height reached by the rocket is
)
velocity (km 6-t1
77.
An object is thrown vertically upwards into the
air. Taking velocity upwards as positive, which of
the following graphs best represents the variation
of acceleration with time?
A
acceleration
time (h)
A
C
B
4000km
8000km
acceleration
20
B 6000km
D 12000km (
)
The diagram shows a man near the edge of a cliff
projecting a stone vertically upwards. The stone
reaches the sea after 18 seconds.
acceleration
acceleration
18.
The graph below shows the speed of a cyclist who
is moving along a hilly road without peddling.
He is depending on moving down the slopes to
gather the speed.
speed
The velocity-time graph for the motion of the
stone is shown above. Find the heisht of the cliff.
A 180 rn
B 540 ni
At which point
C
was the botrom of the first
hill
720m
D e00m
(
)
2I.
The diagram below shows a series of photographs
of a ball rolling with constant velocity.
The camerawas capturing images at a constant rate
of 20 per second. What was the speed of the ball?
displacement
o
displacement
2.0 m
A
C
1.0 m s-l
2.5 m s-l
B
D
2.0 m s-1
10.0 m s-t
22. The velociry-time graph below
represents the
motion of a particle along a straight line.
C
displacement
\?,,
displacement
Which of the following is true?
I
II
m
A
C
23.
The particle's velocity is momentarily
att=5s.
^t
zero
The particle comes back to its starting point
in
12 s.
The particle travels in the opposite direction
betweenl=5s andt=72s.
I only
B II only
I and II only
D I,II,andIII
(
24. When someone on Earth drops a rock, it
accelerates at about 10 m s-2. When a rock is
dropped on Mars, the rock accelerates at about
2.0 m
s-2.
Which diagram shows the velocity-time graphs
for a rock dropped on the Earth and dropped on
Mars?
)
The graph of velocity against time for a moving
object is shown.
tme
c
tr'g
Which of the following is the corresponding graph
of displacement against time?
D
25. A car which is initially at rest rolls down
inclined plane as shown below.
a
smooth
28.
A
car slides down an inclined surface PQand
moves horizontally along QS. QR is a rough
surface whilst PQand RS are frictionless. Between
which of the following points on its path does the
object move with constant speed?
Which of the speed-time graphs best represents
the motion of the car?
A speed
B
rough
surface
smooth surface
soeed
speed
A PandQ
C Rand S
time
speeo
29.
B
D
Qand R
Qand S
On which of these slopes does the ball ro11 down
with increasing speed and decreasing acceleration?
(Neglect frictional forces)
A
B
time
(
26. A'heavy-laden
trolley in a supermarket is difficult
to start from rest and difficult to stop while it is
moving. This is due to its
A friction
B inertia
D momentum
C weight
I
t
27.
The following graph represents two objects A and
B in a state of linear motion. Which one of the
following statements is correct?
30. The figure below shows the
acceleration-time
graph of an object, moving towards the right.
alm s-z
velocity/m s-1
time/s
A B overtakes A
Which of the following curves correctly shows the
velocity-time graph of the objectl
A
at the end ofthe third second.
at the end ofthe fifth second.
B B overtakes A
c In the first three seconds, the average speed
of B is greater than that of A.
D In the first five seconds, the average speed of
B is greatel tharr that of A.
v/ms-'
16
B
y/ms-1
16
v/m s-1
For questions 31 and 32, refer to the following
C
situation.
D
ab
The ball goes up
37. Agirlthrows
moves vertically upwards past five
floors at zero acceleration.
A boy runs 70 m along a straight ffack ar
constant
ards.
speed.
(
a
)
girl.
The starting spe
Which of the following speed-tirnegraphs best
represents the motion of the ball? (Neglect air
35.
The graph shows how the speed of an object varies
with time.
resistance)
A
A lift
velocitv/m s-1
B
time/s
Which
ing is correct?
A The
d of th. object during the
first
20 m s-1.
B The acceleration ofthe object during the first
C
D
32. Assuming that the acceleration due to gravity g
to be 10 ms-2, when will the ball return to the
thrower?
A
C
1s
4s
B
D
2s
10s
second is 20 m s-2.
The deceleration of the obiect is 10 m s-2.
The object is traveling at a constant speed
during the last second.
(
)
36. A trolley
runs down a slope from rest.In the first
3 seconds it travels 3.2 m.What is the constant
acceleration?
A
C
37.
0.2 m s-2
0.7 m s-2
llagram below. Which one ofthe following is
NOT
correct?
Acceleration
Final Velocitv
lncrease in speed
Time of travel
time
34.
Which of the following does not
illustrate
uniform motion?
A A ball rolls along a frictionless surface.
B A mass is thrown verticalll, nprvards u,itl-r a
speed of 10 rn s-l.
)
The velocity-time graph of an object is shown
in
1!e_
A
B
U
D
B 0.4 m s-2
D 1.6ms-2 (
A-
B
C
D
The object is under uniform acceleration.
The gradient ofthe graph is the acceleration
ofthe object.
The area S is the total clist..rnce travelled in
ulle
t.
The object starts from
rest.
(
38.
A body is allowed to fall from rest through the air.
Neglect air resistance. Which graph shows how
the speed of the body changes with time?
A
B
speed
42. A basketball
is released such that it falls vertically
to the ground and bounces back upward again in
a vertical direction. Which one of the following
velocity-time graphs best represents the variation
ofvelocityvwith time t if the upward direction is
speed
taken as positive?
A+vB
time
speed
time
D
S
C
+.v
D
+.v
39. An object starts from rest and undergoes constant
In the first second, it travels 2.0 m.
How far does it travel in the next second?
A 2m
B 4m
( )
C 6m
D 8m
acceleration.
40.
43.
stone is thrown upwards from A and follows
a parabolic path. The highest point of the path is
B.
A
A
spacecraft descends to the Moon's surface
at a steady velocity of 2.0 m s-1. At a height of
4.0 m, the engines are cut off and it falls freely
to the surface. Taking the Moon's gravitational
acceleration to be 1.6 m s-2, at what speed does it
strike the Moon?
A 3.6 m s-l
C
44.
12.8 m s-l
B 4.1 m s-l
D 14.8ms-1 (
The speed-time graph below shows the motion
an object.
Which of the following statements is true about
the gravitational acceleration?
A
B
C
D
It
It
It
It
is zero at B.
is greatest at B.
is greatest at A.
is the same at A and
B.
(
)
47. A stone is dropped from rest from the top ofa tall
building.The fraction
distance fallen in the first 4 seconds
distance fallen in the first 2 seconds
is approximately
A1
C4
B2
DB
Which of the following statements is a wrong
deduction from the graph, with regards to the
motion of the objectl
A The object moves with constant speed and
B
c
then decelerates to rest.
The deceleration from B to C is constant.
The object is never at rest.
D The distance moved during the time OC
is represented by the arel of the tlepezitrrn
OABC.
(
)
of
45.
48.
A
stone rolls off the edge of a vertical cliff.
Neglecting air resistance, which of the following
best describes its subsequent motion?
Vertically
IB
C
D
Horizontally
velocity Decreasing velocity
Constant velocity Constant aiceleration
Increasing
Constant acceleration Constant velocity
Increasingvelocity Decreasingacceleraiion
()
49.
R
A
C
46.
0.80 m s-l
0.40 m s-l
B
D
A marble is dropped from a height onto the floor.
It then rebounds. Which graph best represents
the velocity v of the marble plotted against time
t?
AvBv
1.60 m s-l
2.00 m s-1
A small ball is given
an initial push up an inclined
slope. It moves up the frictionless slope and
down again. Which of the following grupis b.rt
represents the velocity-time graph of its motion
from point A to B and back to A again?
50. When a mass starts moving from rest and
a
constant force acts on it.
I the acceleration is constant
II the velocity increases at a constant rate
III the distance travelled is directlyproportional
to the time
Which statement(s) is/are correct?
A
only
B I and II only
C I and III only
D I,II, and III
51. Object X falls freely from rest for 3 seconds
and
Y also falls freely from rest for 6 seconds.
Which of the following statements is correct?
Yfalls
object
47. In a 100 m sprint, the winner of the race is the
runner with the greatest
A
B
C
D
C-
initial acceleration
average velocity
final velocity
ma-ximum
velocitl,
A
B
D
(
)
far as X
far as X
three times as far as X
four times as far as X
half
as
twice
as
52.
The following graphs show the distance s travelled
by a car from a fixed point with time t. Which
of the graphs A, B, C or D represents the car
gradually slowing until
it
54. The graph shows how the velocity of an object
changes with time. Which point on the graph
shows the objects moving with the greatest
acceleration?
stops?
velocity/m s-l
53.
The distance-time graph represents a car journey.
The average speed in km h-l during the 5-hour
55
journey was
A ball of weight Wis released from the top of the
Eiffel Tower. After some time, it is noticed that
the ball reaches terminal velociry. This is because
A Wbecomes a consranr.
distance/km
B
C
D
56.
A 200
c40
B
130
D50
W ts equal to the air resistance.
Wbecomes equal to the gravitational pull on
the ball.
Wis eoual to the mass of the ball.
A
stone falls from the roof of a tall building.
Neglecting air resistance, what is the distance
travelled by the stone within the fourth second
after it falls from rest?
A
35m
\- ))m
B 45m
D 65m
(
)
1.
The graph below shows how the velocity varies
with time for a given body.
4. A constant force of magnitude
100 N acts on a
5 kg mass.If the mass starts from rest, what will
its velocity be after 3 s?
A 60 m/s in the direction of the force
B 60 m/s opposite to the direction of the force
C 90 m/s in the direction of the force
D 90 m/s opposite to the direction of the force
velocity
)
5.
time
Which of the following statement islare true?
I The resultant force acting on the body
II
is
P, q R, S and t of different masses
are.connected by four identical strings S1, 52, 53
and S, as shown. They are pulled by a iteadily
increasing force E Which of the following strings
is most likely to break?
Iive blocks,
nevet zero.
The forces acting on the body is never
constant for any period.
III The object is never at rest.
A IandII
B I, II and III
C II and III
D IIIonly
ASI
(
c53
)
6.
2.
Bs2
D54
Two objects, A (of mass 3 kg) and B (of mass
2 kg), are stacked one on top of the other as
shown.
A
B
c
D
J.
Tr
15N
5N
10N
7.5 N
T2
15N
1ON
ed as frictionless, then
5N
7.5
m
N.
A5
A
body is moving in a straight line under the
action of a constant force.What change will occur
to the body?
A Change in acceleration
B Change in inertia
C Change in kinetic energy
D Change in mass
( )
C2
7.
'
s-2,
B
when B is pulled
3.3
DO
You are told that both a 3 N horizontal force and
a 4 N horizontal force are acting on an object, but
you are not told their directions. Based on this
information, what is the possible range for the
magnitude Fof the ne t for.cc irctins o,, il,. obie ct?
A 3sFs4
C 3sFs5
U 1<rqsl
D 1sFs7
(
).
8. A constant horizontal force is applied to a body
11.
initially at rest on a smooth horizontal table.
Which of the following quantities will not change
during the application of the force?
A
B
C
D
9.
The displacement of the body
The velocity of the body
The acceleration of the body
The kinetic energy of the body
(
A balloon is acted upon by three forces, weight,
upthrust and sideways force due to wind, as
shown in the diagram.
upthrust
10 000 N
)
Two blocks X andY of weights 8 N and 2 N
respectively are suspended by two strings as
shown. A downward force of 4 N is applied to Y.
Find the tensions { and Z, in the two strings.
weight
9000 N
What is the magnitude of the resultant force on
the balloon?
5OON
1000 N
B 51ON
D 1120N
A
c
T1
A 8N
10N
c 12N
D 14N
B
10.
T2
22N
4N
6N
6N
1.2. An object is accelerating under the influence of a
force ,F, on a frictionless surface. A while later, an
opposing force Frof the same magnitude acts on
it. What will happen to the object?
A
Two forces act on an object. The forces are X
and Y. The object is moving in the horizontal
direction. Which values of A and B would cause
the object to move with constant speed?
B
c
D
13.
XY
A 20N 100N
B 100N 20N
c 80N 80N'
D 100N 80N
will slow down.
The object will move at constant velocity.
The object will come to rest immediately
after the opposing force acts on it.
The object
The objectwill move in the opposite direction.
()
Two forces of 30 N act simultaneously on a body
of mass M.Which of the following arrangements
would produce the greatest acceleration?
C
t
t
S
e
(
30N
+
E
l30
N
E
e
i!
i!
1L
14.
Two strings are attached to an object at the
same point. '[hey are each capable of sustaining
a tension of 60 N and they subtend an angle of
77. A body of mass 4.0 kg falls vertically through air.
When the magnitude of air resistance is 30 N,
what is the acceleration of the bodyl
A I7.5 m s-2
B 7.5 ms-2
C 2.5 m s-2
D 0.4ms-2
720".
18.
(
)
When a mass starts moving from rest and
a
constant force acts on it,
I the acceleration is constant.
II the velociry increases at a constant rate.
III
the distance travelled is directlyproportionally
to the time.
Which statement(s) islare correct?
A I only
B I and II only
C II and III only D I, II, and III
What is the maximum weight they can support?
A 3ON
B 6ON
C
D12oN
9ON
15. The diagram below
(
)
shows the top view of a field
()
79. The velociry-time graph shows the motion
particle moving in a straight line.
of
a
velocity/m s-l
separated into four sectors P, Q, R, and S. A cart
tied to three ropes is placed in the middle of the
field. Three bull carts start to pull the ropes (with
forces indicated in the diagram) at the same
time. In which sector will the cart start to move
initiallv?
5N
time/s
o
P
What may be deduced about the resultant force
3
S
N
magnitude of forces
not drawn to scale
First2
R
A
B
6N
A
B
c
D
16.
acting on the particle during the first 2 s andafter
2s?
C
Sector P
Sector Q
Sector R
Sector S
D
Why does an objest falling in the Earth's
gravitational field reach a steadyvelocity?
fhe mass of the object remains .orrrt"rrt.
The weight of the object increases as it falls.
The Earth's gravitational field decreases as it
After2
s
constant
increasing at
a constant rate
constant
s
zeto
constant rate
increasing at a
constant rate
at an increasing
constant rate
ZEIO
(
20. A box of mass 2 kg moves with a constant speed
of 0.1 m s-l when a force of 6 N is applied.
A
B
C
0.1 m s-l
falls.
D
Air
resistance increases
with the increase of
velocity.
What is rhe frictionaL force acting orr the box?
A ON
2N
C
3N
B
D
(
&
I
2t. The diagram below shows that two forces acting
at a point O are represented in magnitude and
direction OX and OY. The third force required to
maintain equilibrium is represented in magnitude
and direction by
24. An astronaut's boots weigh 100 N on Earth where
the acceleration of free fall is 10 m s-2. How much
will theyweigh on Mars where the acceleration of
free fall is 4 m s-2?
A
C
40N
D 400 N
25N
B
1OON
25. A
skater is pushing a snowmobile across an ice
rink. The skater pushed with a horizontal force
of 80 N and the snowmobile exoeriences a force
of friction of 30 N. The snowmobile has a
mass of 20 kg. What is the acceleration of the
snowmobile?
A 4.0 m s-2
BXY
DTX
AOZ
czo
22. Two forces P and Qact at a point X
C
as shown
in
the vector diagram below.
In which of the following diagrams does the vector
F represent the resultant force ofP and Q!
A
B
2.5 m
s-2
B 1.5 m s-2
D 0.25ms2 (
)
26. An
object of mass 5 kg is dropped from the top
of a building. Which of the following statements
is true? (Neglect air resistance)
A It falls with a constant acceleration of L0 m s-2.
B It falls with a constant velocity of 10 m s-1.
C It falls with a constant acceleration of 20 m s-2.
D It falls with a constant velociry of 5 m s-1.
27. Two forces of magnitude 8 N and 6 N act on the
same body. The angle between the forces is 90o.
What is the magnitude of the resultant of the
forces?
A
C
7N
14N
B 10N
D 24N
(
)
28. Three coplanar forces, of magnitude 20 N, 40 N,
and 50 N, act on a body at P in the directions
shown in the diagram below.
23. When
surface
of mass 3 kg was pushed along a
with a force of 3 N, it moved with constant
a block
speed.
When the same block was pushed with a force of
9 N,what happened to the block?
A It moved with a constant speed of 2 m s-1.
B It moved with a constant speed of 3 m s1.
C It movedwith a constant acceleration of2 m s-2.
D It movedwith a constant acceleration of 3 m s-2.
()
East
(bearing 90')
(bearing 27o') P
Which one of the following is the approximate
bearing ofthe additional force required to maintain
equilibrium?
A
c
37"
143"
B !27"
D277"
(
)
29. When a horizontal force of 4 N is applied to
a wooden block of mass 2 kg on a hoizontal
34.
with a constant velocity.
force
If the
is increased to 12 N, what will be the
acceleration of the block?
their resultant?
surface, the block moves
A
C
JU.
)
35.
a nail on a piece of wood with a
speed of 6 m s-1. If it drives the nail 0.1 m into
the wood, what is the average deceleration of the
hammer?
18ms-2
120 m
s-2
B 60ms-2
D 1B0ms-2 (
B 4N
D 8N
2N
6N
(
)
Two forces X and Y acting on a ball produce
a resultant force R on the ball. Which of the
following vector diagrams correctly represents the
addition of the force X and Y to oroduce R?
A.YBY
)
A 4.0 kg block ofwood is pulled along a horizontal
ground from rest, and a force on 15 N is required
to produce an acceleration of 2.0 m s-2.
What should the magnitude of the force be in
order to pull the block of wood at constant speed
of 5.0 m s-1 on the same horizontal sround?
A
C
32.
(
A
c
A hammer hits
A
C
31.
B 4ms-2
D 8ms-2
2ms-2
6ms-2
N and 6 N actatapoint.Which one
of the following could not be the magnitude of
Forces of 2
5N
8N
B 7N
D 1oN
(
An empty lift of mass 200 kg is moving up with
uniform velociw of 1.5 m s-1.
)
36.
Two forces, 4
N
and 6 N, act on a body to
of the following
give a resultant force F, which
statements is true about Fl
a
A
B
C
D
37.
F can be less than 2 N.
F can be greater than 10 N.
Fcanbe5N.
F can only be in one direction.
(
)
The diagram shows the velocity-time graph of an
object.
Taking gravitational acceleration to be 10 m s-2,
what is the resultant force on the lift in newtons?
200
AO
c
33.
300
B
(
D2ooo
)
When a block of mass 1.2 kg is pushed with a
horizontal force of 3 N along a horizontal flat
surface, it moves with a constant speed of 1.0 m s-1.
Howwill the block move when it is pushed along
the same surface with a horizontal force of 9 N?
A At a constant speed of 5 m s-1
B At a constant speed of 6 m s-1
C At a constant acceleration of 5 m s-2
D At a constant zrccclcratiorr o[6 m s
2
What can be said about the resultant force acting
on the objectl
A. It is zero.
C It is increasing.
B It is constant.
D It is decreasing.
()
38.
An object is moving in a straight line at 6 m
s-1
when a constant force acts on it from the opposite
direction. If the force is held constant for a long
time, how long will the object move?
A It will stop moving immediately when the
B
c
D
taut.
force is applied.
It will decelerate and then stop.
It will decelerate, stop and then move in the
opposite direction with a constant speed.
It will
decelerate, stop and then move
in the opposite direction with a constant
1.20 N
()
acceleration.
39.
40. A pendulum bob ofweight tr{/N, is suspended by
a string from a point P. The bob is drawn aside by
ahorizontal force of 0.60 N so that the string is
A ball of weight W shdes along a smooth
horizontal surface until it falls offthe edge at time
T.
The weight of the pendulum bob, in N, is
0.60
A 0.45
c 0.70
B
D 1.60
(
41,. A rocket, launched vertically, receives a constant
thrust throughout its ascent. However, its
acceleration increases steadily as it goes up.
Which one of the following reasons does NOT
explain the increase of acceleration?
A The air resistance becomes smaller.
B The total mass of the rocket is constantly
)
]f
Which graph represents how the resultant vertical
force .F acting on the ball varies with time I as the
ball moves from position P to position Q
AF
BF
C
D
reducing.
The Earth's gravitational field becomes weaker
The atmospheric pressure becomes smaller.
()
42. The diagram
shows a mass of 3.0 kg suspended
two bars of negligible mass connected by
from
five light strings. What tension in the string
labelled X?
A
C
N
100N
1.0
B 5.ON
D 15.0 N
43. Forces P and Q act at a point O as shown in the
diagram below. The angle between their lines of
action is fixed at angle 0, greater than 90" but
44.
Two loads,
\znd
Wrarc attached to the ends
of
PQwhich is hung over a frictionless pulley
as shown in the diagram below.
a rope
lesser than 180o.
Frictionless
pulley
If the magnitudes of P and Q can be varied, the
line of action of their resultant can be made to lie
I between the direction of P and OY
II along the direction of OY
III between the direction of Q and OY
A I and II are possible.
B I and III are possible.
C II and III are possible.
D I, II and III
are
possible.
(
Load W, moves downwards when it is released
from rest. Which of the following statement is
true?
A
Load Wrmoves downwards with uniform
acceleration.
B
C
D
Load Wrmoves upwards with uniform velocity.
Tension in the rope equals to Ll/r.
Tension in the rope equals to (\* ,I/r).
Moments
1. A Bunsen burner is a very stable obiect because of
4.
its
A high centre of
gravity and broad base
The diagram shows a balancing toy pivoted on a
stand.If the toy is tilted slightl)a it does not topple,
but returns to its original position.
low centre of gravity and broad base
c high centre of gravrty and narrow base
D low centre of gravity and narrow base
B
2
The diagram below shows the first step in an
experiment to determine the position of the
centre of mass of a thin card. What is the next
step in this experiment?
This is because the centre of gravity of the toy is
A inside the weight.
B below the pivot.
C befween the man.
D exactly at the pivot,
5.
thin string
A
B
C
D
3.
Measure the thickness of the card.
Measure the mass of the card.
Hang the card from point R.
Find the midpoint of
Arrange the blocks in order of increasing mass.
A
as shown
below:
large stone
At which position A,
applied on the rod
so
D should a force be
that the large stone can be
B, C, or
X,Y,Z
C X,Z,Y
PQ
A metal rod is used to ,"i.. alargestone
Three blocks X, Y, and Z arebalanced on a beam
with the pivot at the midpoint.
B
Z,X,Y
D Y,X,Z
(
9.
A hammer can be suspended in equilibrium from
three different positions as shown.
point of
suspension
30N
Given that the centre of gravity of the trap door
is 60 cm from X, what is the tension T in the
string required to just
A 18ON
C 28N
7.
Which of the following matches the figure with
their rypes of equilibrium?
Neutral Stable Unstable
lift the trap doorl
B
'q.3
81
c273
6ON
D 18N
(
Ds2r()
o
10.
20N
60N
The diagram shows a uniform metre rule with
negligible weight. What is the force acting at the
pivot?
A 40N
B
20N
80N
D
1200
c
8.
12
32
Some passengers are on board a double-decker
bus travelling along a horizontal highway. The
number of passengers in each deck is as indicated.
Which is the most stable bus?
N
A
heavy uniform
by two forces .E, a
L/4 fromits
()
ends
11.
The diagram below shows a uniform beam Xy of
length 1 m supported at Pwhere pX = 20 cm.The
beam weighs 5 N.
aa
What is the ratio of { io Er?
A 2:5
C 2:3
B
D
3:5
3:2
20cm
|<__+i
:
What downward force exerted at X will balance
the beaml
5.0 N
12.5 N
A-
c
B 7.5 N
D
20N
(
12. A uniform
metre rule is balanced at the 62.0 cm
a
mark with mass of 24.0 g suspended from the
100.0 cm mark as shown in the diagram. What is
15. The diagram below
shows a ball of diameter
30 cm placed against a step of height 15 cm. If
the ball has a mass of 15 kg, what minimum force
F applied at a point as shown is required to move
the ball up the step? Assume that the gravitational
force acting on a mass of 1.0 kg is 10 N.
the mass of the rule?
62.0 cm
A
C
13.
B 79.0 g
D 76.09
74.7 g
38.7 g
(
A 15N
c 150N
)
The diagram shows a uniform metal bar of length
4 m and mass 50 kg. A man pulls straight up with
a force F at one end Qof the bar so that it pivots
about the end P.
76
B 75N
D 300N
(
)
A uniform
beam PQof length 5 m is placed on
end supports and a man ofweight 800 N stands at
M such that QM = 2 m.The value of the reaction
forces at P and Qrespectively, due to the man's
weight are
)f
LC
d.
When the end Qjust comes offthe ground,
what is the value of the force F?
25N
125N
A
c
B
D s0oN
250N
(
A
300
N and 500 N
B 320 N and 480 N
C 400 N and 400 N
D
17.
of
480
N and 320 N
An object fixed at one end ofa rod is balanced by
a 100 g mass as shown. The distance between the
100 g mass and the pivot is x.The setup is brought
to the Moon where the gravitational field strength
is 1.6 N/kg.
1e
10N
A bar is hinged to the wall. Three forces act on
the bar. The bar remains in equilibrium. What is
the moment due to the force Q
A 5Nm
C 10Nm
' B ONm
D 20Nm
(
100 g
MASS
..In order to achieve balance, what should the
distance between the 100 g mass and the pivot
be?
^
'1,.6x
A
R,
10
C L6x
u,(10r
r.o
18. Which of the following
shows a sphere in stable
equilibrium?
AB
&
79.
C
Fn^
B
A uniform metre rule is balanced at its centre of
mass as shown in the diagram. When masses X
and Y are hung from positions indicated, the rule
remains in eouilibrium.
A 25N
90
100 cm
50N
D 100 N
B
C 75N
22. The diagram below shows a man of weight
N standing in the middle of a uniform, rigid,
horizontal plank. The plank weighs 1000 N.
Which one of the following diagrams shows the
800
What can be concluded about the masses X and
Y?
A
B
C
D
X and Y have the same mass.
X and Y have the same densiry.
The ratio of the mass of X to that of Y is 4:3.
The ratio of the mass of X to that of Y is 3:4.
forces on the plank?
()
A uniform
metre rule of weight 3.5 N is hung
f.
from a piece of string tied at the 65 cm mark.The
metre rule is balanced by hanging a. masq m, at
the end of it.
800 N
1000 N
A barrel of weight 1500 N and radius 0.5 m rests
What is the tension ?in the stringl
1.5N
3.ON
C 3.5N
D 5.ON
A
27.
A
B
against a step of height0.2 m as shown.
(of side 1 m) consisting of
PqRS is attached to a vertical
square shop sign
a uniform lamina
wall by a hinge at P so that S rests against the wall
vertically below P. If the mass of the sign is 5 kg
the normal reaction exerted by the wall at S is
What
is the smallest
horizontal force F through the
centre O needed to push the barrel over the step?
1125N
1200 N
1875 N
)
A
c
B
D 2000N
(
24. The diagram below
Where is the centre of mass of the bus if it does
not tilt over when travelling at an angle as shown
in the diagram belowl
shows an oval disc pivoted
freely at point A.
Which of the points is the centre of
mass of the
disc?
OA
oB
OC
D/
)
25
ht
A
A
child weighing 500 N sits on a see-saw at
distance of 2 m from the centre of the see-saw.
What force must be exerted at X to balance it?
a
N.
29.
ne
jumped over.
500 N
A
N
C 200 N
\
100
B
D
150
250
The centre of a bridge was broken in a storm. A
man of mass 100 kg tried to go over to the other
end, but after 10 m, the bridge started to creak
badly and he had to return. A teenager tried to do
the same and just managed to reach the gap and
N
N
26. A uniform
metre rule of weight 0.2 N balances at
the 60 cm markwhen aweightW is placed at the
80 cm mark. What is the value ofW?
0.15 N
A O.1N
C O.2N
B
D 0.2667N (
)
If the gap is 20 m from end A, what is his mass
27.
Which of the following objects, when displaced,
is seen to be in neutral equilibrium?
StS
A
B
C
D
A heavy weight suspended on a string
A pencil balanced on its sharp tip
A cone resting on its slant edge
A pyramid resting on its base
in kilogram?
440
cso
(
(
)
plank of length 3 m is balanced at its
midpoint P on a pivot. A 20 N weight is hung
from the plank at various positions. Which one
of the following moment of force about P is not
possible?
:p?
D2so
30. A uniform
)
A -10Nm
C 20Nm
the
867
B ONm
D 35Nm
(
)
31. A uniform
metre rule of mass 0.2kgis supported
by two identical spring balances as shown in the
diagram below The points of suspension are at
the 30 cm and 60 cm mark.
D
()
34. The apparatus below is set up on Earth.It shows
a piece of soft iron X of mass 0.60 kg fixed on one
end of a uniform beam AB which is pivoted at its
midpoint.X is prevented from being pulled down
by a fixed magnet by a load of 1.00 kg hung at A.
Find the position at which a 0.1 kg mass must
be placed such that the spring balances have the
same reading.
15 cm mark
A
C
35 cm mark
B
D
25 cm mark
45 cm mark
magnet
32.
A uniform metre rule of weight 2.0 N is pivoted
at the 60 cm mark. A 4.0 N weight is suspended
at the 100 cm mark, causing the rule to rotate
about the pivot.
60 cm
100 cm
The experiment is now conducted on the Moon
where the acceleration due to graviry is one-sixth
that ofthe Earth.The mass of the load at A required
to maintain the equilibrium of the beam is
1.00 kg
3.00 kg
3.60 kg
)
A
B
D 6.00ks (
C
4.0 N
At the instant when the rule is horizontal, what
is the value of the resultant turning moment
about the pivotl
A
B
C
D
Zero
l.4Nmclockwise
l.6Nmcloclovise
20N
O.2Nmanticlochn'ise
33. Which
of the diagrams shows how a piece of card
with centre of gravity atM hangs when suspended
A 1 metre long bar is held horizontal by two strings
which have tensions { and Tr.Two forces of
20 N and 80 N act at the 20 cm and 60 cm marks,
respectively. Determine Trand Tr.
by a thread?
A
B
80N
A
B
c
D
Tr
4ON
48N
52N
6ON
T2
5ON
52N
48N
4ON
36.
The diagram below shows a light rod under the
action of three vertical forces. The points P, Q" R,
S and T are equally spaced out along the rod. At
which point must an upward vertical force of 2 N
be applied to hold the rod in equilibrium?
39. The diagram shows a light rod with two weights
hanging from it. A thirl weight is to be added to
bring the system into equilibrium so that the rod
is balanced. What weight is required and where
should it be placed?
0.300 m
)
0.600 m
VS
1e
tS
TN
A.
AS
ca_
37.
A
B
c
D
BR
DP
Below is a lamina of uniform thickness. Its centre
of gravrty is most likely to be at
40.
Weight
3.00 N
3.00 N
4.00 N
4.00 N
Position
0.200 m to the left of the pivot
0.200 m to the right of the pivot
0.600 m to the right of the pivot
0.300 m to the right of the pivot
Which of the following is in
neutral
equilibrium?
A
B
C
D
)n
th
ed
38.
,gs
of
ks,
The centre of mass of the lamina in the diagram
is at B. A disc is then attached as shown. Which
letter shows a possible position of the centre of
mass of the lamina-disc combination?
A heavy weight suspended on a string
A cone resting on a slant edge
A heavy based table lamp
A pencil balanced on its sharp tip
(
)
Work, Energy and Power
1. A
64.8 kg hiker starts at an elevation of 1 500 m
and climbs to the top of a 2 500 m peak. What
is the,miqimum power to be applied by the hiker
if he takes 6 hours to complete this climb? (Take
acceleration due
A 30w
c
2.
to gravity
as 10
B
m
move along a horizontal surface at a constant
s-1. The power developed is
velocity of 3 m
s-2)
180W
D 6480W (
1080w
5. A force of 30 N acting on an object causes it to
)
An object of
mass 20 kg is pulled up a slope of
15 m long. The frictional force between the obiect
and the slope is 30 N. The minimum work done
uf!!:j"lli"q
A 90w
c 27W
force is
B
33W
D 10w
6. A ball is released from rest from one side of a
smooth curved rail as shown in the diagram below.
Neglecting air resistance and friction, which of
the following statements about the motion of the
ball is/are correct?
A
c
a
J.
4sol
r4s0l
B 1000J
D30o0J (
)
A
0.2 kg mass is thrown vertically upwards so
that it reaches a height of 3 m above the point of
projection. What is its kinetic energv_when it is
goin-t of drojection?
33-"b":.jle
I
The speed of the ball at C is the same
at point
A
10J
C4J
4.
point of projection
II
.B
III
6T
D2T
What are the
energ"y changes
in
electrical + potential -+ kinetic
electrical --+ kinetic
- potential
potential --+ kinetic
- electrical
kirreric
poterrtial - elecriczrl
-
.7
(
)
that
ball has a maximum potential enery
^t
point B.
The ball would not rise to a level higher than
point D.
A III only
C II andIII
hydroelectric
power productioni
A
B
C
D
"The
as
A.
B I and III
D I,II and III
()
An electric heater has a pbwer output of 300 W.
What is the quantity of heat generated in 30
rninutes?
A
10J
qnnnT
R
1<n
(,1n
T
tn".q
11. A container is lifted vertically with a force of
The diagram below shows two blocks P and Q'
initially stationary and connected to each other
by a taut string passing over a smooth pulley. The
system is released from rest and block Qmoves
vertically downwards from position A to B.
Which of the following is correctl
10 000
N from the wharf onto the deck of a ship,
a height of 5 m.
What is the work done?
sooooN B sooooJ
c 1oo00J D 2sooJ (
A
Potential energy of the block Qut A = Kinetic
energy of block Qat B.
Lorr-i., potential energy of the whole system 72'
= Gain in kinetic energy of the whole system
+ work done against friction due to block P
moving against a rough surface.
Loss in potential energy of the whole system
= Gain in kinetic energy of the system.
Loss of potential energy of block Q= Gain
( )
in potential energy of block P
a
of
he
9.
A
)
A
man of mass 60 kg takes 1 minute to run up
stairs from X to Y as shown in the diagram below.
The man has a working power of
Y
block slides down from rest at point A.
Assuming theifrictional force is negligible, what
is the speed of the block when it reaches B if it
tr",o.hffi along the slope?
A
c
13.
3.0 m
A
B
c
D
10.
80w
B 100w
D 6oW
(
7.7 m s'1
8.5 m s-1
9.0 m s-1
cannot be determined
runs up a flight of stairs
of vertical height 5 m in 4 s. What is her gain in
potential energ'y and the !6Ver developed?
Power
Gain in potential
enefgy
developed
C
1600 J
2000 J
16 000 J
D
20 000 J
B
Which path requires the ieast amount of work?
500w
A Path L
B Path M
C Path N
4000 \4/
5000
D An equal amount
three patl'rs.
400
w
\v
(
)
)
A weight is to be lifted from a level X to a higher
level Y along different paths labelled L, M and
N.
A girl weighing 400 N
A
W.
30
140W
oFr,vork is done aLong the
(
74. The diagrams below show a man (i) about to
climb a ladder, (ii) climbing up a ladder and (iii)
halfway down after falling of ifr. ladder.
An object falls freely from rest (point X) to the
ground (point Z).Whatis the ratio of the kinetic
of the object at Y to its kinetic energ.y at
17.
T.tgy
Which of the following is correm?
Z?
o
Between (i)
and
A
Between (ii)
(ii)
and
Gain of potential
energy
energy
Loss of potenrial
energy
Gain of kinetic
C
Gain of potential
D
energy
Loss of kinetic
energy
za
(iii)
Gain of kinetic
A 7:1.47
C 7:4
energy
Loss of kinetic
energy
Gain of kinetic
energy
B 1:2
D 2:7
(
)
18' A drybllery C
small 2 W elec
ef energy to a
the baliery is
exhausted. For
does the motor
(
h
run?
i5.
pulled up
A 1500
cso
a
ed by a force
B
100
D2s
(
)
the distance
moved along the plane is 72 m, the increase in
height is 1.0 m (see diagram below).
19.
gid weighing 500 N runs up a flight of steps
1
5
T i" height in 3 s. 'hat average p-ower is the
girl developing?
,{ 25oW
c 1500w
20.
B 1000 w
D 2000w (
)
objlct is dropped from a tower 50 m high.
f1
When it is 10 m from
the ground what is the
ratio of the body's potential energy to its kinetic
energy? (Neglect air resistance)
A 1:5
C 7:2
27.
What is the work done against friction?
A 300J
c36oJ
B 54OJ
.D84oI
(
B I:4
D 4:I
(
)
From which source would the release of energy
be
by a change in the Earth's gravitational
1ff.e:-r.d
fieldl
A
C
)
22.
A
Chemical
Hydroelectric
B Geothermal
D Nuclear
(
)
car of mass zz has an engine which can deliver
power P. What is the minimum time in which
the car can be accelerated from rest to a speed
z?
done against water resistance.
3.00
6OOW
30.0
A
c
w
w
B
D
6o.ow (
A#
L2P
)
tnv)
B+
)p
D--
t)l.J'
/
\
\/
he
tic
23. The diagram shows a set of five steps. A student
of mass 50 kg, runs up the steps. What is the
student's gain in gravitational potential energy?
28. Walking up to the top of
a steep
hill usually seems
to be easier rf a ugzag path is used instead of
climbing by the steepest route. Why is this
A
B
C
D
k=10Nkg1)
so?
Less energy is needed.
Less friction has to be overcome.
Less power is needed.
Less time is needed.
(
)
29. A force of 20 N pushes a block of wood of mass
1 kg, causing it to move at a constant speed of
4m
s-1.
4 m/s
A
5*(25+40)x50J
ry%#L*r
c aamiryr
B
(
D:.?l#r
)a
24. A 60-watt light bulb turns half the
tor
A
c
25.
)PS
B 600J
DOJ
6oJ
3ooJ
B
electrical
energy it uses into thermal energy. How much
thermal energy does it give out in 10 seconds?
1J
What is the power required to push the wood?
A 5W
7.5W
C 4OW
D
)
30. A
car cruises along a frictionless track of a roller
coaster.
O
"
B
C
D
force
force r. acceleration
force ,, perpendicular distance from the pivot
force x distance moved in the direction of the
/\
force per unit time
At which point A, B, C, or D is the car cruising
at its maximum
\/3r.
A
gh.
26.
:tic
c
B 27kW
18kW
D
30kw
4skw (
On braking, 500 kJ of thermal energy
stone of weight 100
)
A
B
c
D
be
27.
(
speed?
N is thrown
)
vertically
upwards from the ground with an initial kinetic
energy of 1 60 J. Ignoring air resistance, the kinetic
energy, the gain in potential energ'y and the work
done against gravity when the stone is at 1.00 m
above the ground will be
Water is pumped out a tank by an electric motor
at the rate of 150 kg s-1. The speed of the water as
it leaves the tank is 20 m s-1. What is the power of
this electric motor?
A
nal
)
Which of the following expressions defi nes power?
A force distance moved in the direction of the
-he
:he
(
BoW
were
produced when a fehicle of total mass 1500 kg
to rest on a level road. The speed of
the vehicle just before the brakes were applied
was brought
Kinetic
Gainin
Work
energy potentialenergy done
60J
60J
60J
100J
60J
10oJ
100J
160J
60J
60J
100J
100J
()
was
ver
ich
ri
A
c
0.79 m
0.62 m
s-1
s-1
B
D
25ms-l
62.5
ms-l
(
32.
)
When
A
B
C
D
a car accelerates up a mountain,
it
gains both kinetic energy and potential energy.
gains kinetic energy but loses potential energy.
uains potential energy but loses kinetic energ'y.
lo'es both kine tic rnd potcnrirl energy.
33. On braking,250 kI of heat was produced when
36.
a vehicle of total mass 1000 kg was brought to
rest on a level road. The speed of the vehicle
iust
before the brakes were applied was
A
C
4ms-1
250 m s-1
B 22.4 m s-r
D 500ms-1 (
A fat man of mass 90 kg and a thin man of mass
40 kg take 5 seconds each to run up a flight of
steps measuring 10 m in height. Calculate the
power generated by each man. (Take g = 10 m s-r)
Fatman
A
)
B
34.
A
crate is pushed 10 m along ahorizontalsurface
by a force of 80 N. The frictional force opposing
the motion is 60 N.
How much of the work done is converted into
kinetic energy and internal energ-y of the crate?
A
Internal energy / J
B
c
D
35.
200
200
600
600
Kinetic
energy / J
C
D
37
.
w
w
9000 w
900
1800
180
W
Thin man
w
w
4000 w
400
800
8ow
(
An object is lifted at constant
speed through a
distance of Z metres above the ground in / seconds.
The potential energy gained by the object is equal
600
to
800
A
B
work done on the object
work done on the object minus kinetic
C
D
energy ofthe object
force acting on rhe object
work done x time
200
800
()
Tom, Dick, Ali and Raju stand on concrete sreps
as shown. Each person carries an equally sized
sphere of different mass. They drop ih. sphe..,
onto a smooth level sand nit.
Raju
carfles
)
(
)
38. A
pendulum bob of mass, m, attached to a light
string is released from rest at position p. It makes
one complete oscillation form position p to S and
back to P again. The speed of the bob at its lowest
point Q_iss m s-1.
100 g
ij
.L
+
i=
€
4m
3m
Whose sphere would sink the deepest in the
sand?
A Tom's
C Ali's
B Dick's
D Raju's
(
What will be the kinetic energy of the bob at
point R?
A
B
zero
rnu;z
\. *-'
A7.
Z
D iror. th^.r zerobutless than 4
*-t
(
ASS
of
39. A ball is allowed to roll alongan undulating
as shown. It is at rest at A.
plane
43.
.he
.-2\
A
meteorite of mass 10 kg enters the Earth's
atmosphere and decelerates from 99 m s-1 to
1.0 m s-1 due to air friction. What is the
approximate work done against air friction?
e80J
ee00J
37 6001
)
A
B
c
44.
Which of the following about energy is false?
A
D
IA
ds.
B
Neglecting air resistance and assuming the plane
is smooth, which of the following statements is
ual
C
true?
A
Kinetic energy
a-t=D,!s less
D
than kinetic energy
at E.
B
C
D
)
jht
D 4e000J (
Energy has to be supplied when a man bends
an iron bar
Energy has to be supplied when a chair
supports a man sitting on it.
Energy has to be supplied when a helicopter
lifts a passenger offthe ground.
Energy has to be supplied when a boy swings
his arms during exercise.
()
Pffiiltiat
energy at A is greater than kinetic
energy at D.
Kinetic energy at B equals kinetic energy at C.
Potential energy at B is greater than potential
energy at C.
()
45. Which of the following is equivalent to the unit
of power?
A Jrt
C
kg
B
Nm
D kgm2s-3
m2s-2
(
)
<es
.nd
40
est
A motor rated 50 W accelerates an object along
a horrzontal surface with a constant speed of
2 m s-l against a frictional force of magnitude of
19 N.
A
C
41,
A toy car K moving with
a speed of 30 m s-1 has
kinetic energy of 900 J. Another identical toy car
L moves with a speed of 15 m s-1. What is the
kinetic energ'y of the toy car L?
22sJ
450J
e00J
)
What is the efficiency of the motor?
38o/o
gs-_v^y B
500/o
D 700o/o
760/o
(
A
An object of
mass rlt p^sses at point X with a
velocity v and slides up a frictionless incline plane
to stop at Y which is at a height / above X. A
second object of the same mass passes X with a
velocity of
B
D 18ooJ
c
)
47
.
The variation of the power of a machine with time
is as given below.
)v.To what height will it risel
4
Alt
cln
.
Bln
Din
1L
C
ve
_ts
4s
rtically through a distance of 10 m)
B 1.5s
D 10s
10
12
q;ms7s
What is the work supplied by the machine?
OJ
240J
A
C
42. An electric motor runs with a steady input of
250 V and 4 A while raising a load of 1000 N.
Assuming that the motor and transmission is
100 0/o efficient, how much time is taken to lift the
load
(
(
)
36,0J
B
D 480J
A
ball bearing is placed at point X on a smooth
track as shown in the diagram below. The ball
moves from rest down the track and passes a
point Y which is 10 m below point X. Take
8=10ms-2'
48.
51. A ball is released from a height h above a table.
Assuming that air resistance is negligible and
50o/o of its kinetic energy is lost at each bounce,
what will be the height reached after the second
bounce?
A,tb
ci
I
I
52. An
object has kinetic energy of 10 J at a certain
instant. If an opposing force of 5 N acts on it,
what is the distance it will travel before coming
to rest?
10m
A
C
Find the speed of the ball at point Y.
A 10.0 m s-l
B 14.1 m s-1
C
/lO
a).
h
B+
D+
100 m
s-1
D
141
ms-l
53.
(
)
Kinetic energy is converted to electrical energy in
A an electric motor.
B a electromagnetic relay.
C a galvanometer.
D adynamo.
(
10m
A oJ
object of mass 0.3 kg moving at a constanr
speed has a 27.6 J of kinetic energ'y. At what
speed is it moving?
A 144 m s-1
72ms-r
12ms-1
B
D 6.5ms1 (
)
B 5m
D 50m
(
)
The diagram below shows a box pulled by a
5 N force. A frictional force of 3 N acts in the
opposite direction. What is the work done by the
box against friction if it moves 5 m?
)
50. An
C
2m
C
15J
B 1oJ
D
20J
:
r)
a{
rle.
nd
cer
nd
)
Unit 6
Pressure
D
1. A column of liquid X floats
on water in a U-tube
cross-section
uniform
area.
of
If the density of
water is 1000 kg m-3, find the density of liquid X.
rin
it,
the packet has a small hole that allowed air to
leak in.
()
@ t"
the diagram below, a person of mass 50 kg
is standing on a platform over the piston of area
2.0 x 70-2 m2.
ng
r-iquioi
20 cm
)
ta
the
i!-4e,
tlie
-
('
A
C
2.
1500kgm3
800 kg
mr
B
D
2.0 x 1O-2 mz
mr
500kgm3
1000 kg
The diagrams below show a V-shaped object
What height of water / will just support her?
placed in different orientations.In which position
Assume that the density of water is 1000 kg
A
C
does the object exert the maximum pressure on
the surface it is resting?
5.
0.25 m
5.0m
B 2.5m
D 10m
B
a
On a cloudy day, a sealed packet of potato chips
is taken to the top of a mountain. The packet is
found to be blown up like
a
balloon.This could be
because
A
B
C
the air outside the packet is now hotter than
the air inside the oacket.
the air outside is now at a Lorver pressure than
the rir inside tlre prrcket.
the ultraviolet radiation has increased.
(
The diagrams below show four mercury
barometers. In which of these is the external
pressure the greatest?
J.
--,.
D
A(:J th. apparatus in the diagram below is set up
- ^t a constant temperature of 20 "C, d = 72 cm,
b=
l0
closed
cm.
Mercury has
a density of 13.6 x 103kg m-3 and the
atmospheric pressure is 1.01 x 10s Pa. What is the
approximate ratio of the pressure of the oxygen to
Air is trapped inside the left-hand
limb while the right-hand limb can be
moved up and down. The atmospheric pressure is
760 mm Hg.
If the right-hand limb is raised such that Z is
15 cm, what is the length of the trzpped air, &
that of the atmosphere?
A 1.5:1
C 2.5:7
8.
(
)
The surface of water in a domestic tank is 6 m
above a cold water tap. The density of water is
1000 kg m-3. What is the pressure of the water as
it leaves the tap?
A 60Pa
B 600 Pa
C
9.
B 2.0:t
D 3.0:1
D 60000Pa (
6000 Pa
)
The pressure produced by a cubic block is P. Flnd
the pressure if length /is doubled.
A+
B+
C2P
D4P
(
)
,''fil t. following diagram shows a baromerer
-'- containing a liquid of densiry 1200 kg m-3 above
If the atmospheric pressure
is 76 cm Hg then the height of the liquid in
the mercury column.
centimetres is (Given that the density of mercury
is 13 600 kg
A
8.0 cm
C 11.9 cm
7.
B 11.3 cm
D 17.0cm (
)
Oxygen is compressed in the sealed end of a long
J-tube by means of a column of mercury open ro
the atmosphere as shown.
--')
the
11.
the
rto
)
Some air is trapped in the space above the
mercury in a barometer. Let / be the height of
the air column trapped and lt be the height of
the mercury column. When the glass tube is
pressed down into the mercury bath, which of the
following best describes the change of land b?
C Changes in the temperature of mercury
D Evaporation of mercury from the barometer
/l
( LS ,lThe diagram shows a mercury column in a test\/- tube supported by the atmosphere. What is the
pressure
im
ris
of the gas given that the
atmospheric
pressure is 76 cm Hg?
ras
i
)
ll,.
r.
lnol
T4
)ove
lin
I
n
Decrease
Remain
B
Remain
C
Decrease
Decrease
Decrease
Decrease
A
rury
D
12.
81
71
A
rectangular block weighing 1,92
cmHg
cmHg
B 76 cmHg
D OcmHg (
N
)
has
dimensions 8 cm x 6 cm x 2 cm. What is the
maximum pressure it can exert when it is placed
on a horizontal surface?
eter
sure
A
C
A 4x 10aPa
B 12 x I}aPa
C 16 x 10aPa
D 20 x 10aPa
Increase
The diagram below shows a simple mercury
barometer.
15.
The handle of the piston below was initially at the
5 cm mark (dotted line).
AssumlhE that the temperature of the air inside
the cylinder is constant and that no air is able to
escape from the cylinder, what is the prepsurg- in
the cylinder if the piston is pulled to ghe 20 irn
mark as shown below?
0
:5 10 /-15
A
Four times its initial pressure
B Three times its initial pressure
C Reduced to a third of its initial pressure
D Reduced to a quarter of its initial pressure
I
Which of the followine does NOT
heiglir ot'the merct'ru .o1,,*,.'r to \.rrr\.1
Ani
A
L hlngcs in rrmtlsplrcric pre,srrre
B
Chanqes in the vaiue of g
cause the
A
flask is filled with air and tightly stoppered
at room temperature. The flask is then placed in
melting ice. The flask stays the same size.
In the flask, what happens to the pressure of the
air and the speed of the molecules in the air?
16.
If the
atmospheric pressure is 75 cm Hg, what is
the pressure exerted by the trapped air?
A 5cmHg
C 15cmHg
B 1OcmHg
D 2OcmHg (
)
Two solid cubes are made from the same material.
One cube has sides that are two times as long as
the other.
A
B
C
D
1-
77--
Pressure
Speed of molecules
Decrease
Increase
Decrease
Increase
Increase
Increase
Decrease
"1
Decrease
(
n
Fn
t
.
r.
first
diagram on the left shows a simple
barometer in its original state. The next four
diagrams show the barometer after something has
been done to it. Which of the following diagrams
A,B,C,orDis
c
When placed on one side, the small cube exerts a
pressureP on the ground. Ifone area ofeach side
of the small cube is A, determine the pressure
exerted by the large cube standing on one ofits
faces.
A2p
B4p
D
c8p
qqJ A forked tube
contains air
73t
in one branch and
a
vacuum in the other as shown.The pressure of the
enclosed air is
I
;d
more
mercury
added to
reservorr
X
tube
was
lowered
further
into the
reservorr
t
mercury
was
removed
from the
reservoir
/---)'
(\,-,/L9. The mercuryr barometer shown below contains
some trapped air in the tube.
mercury
d(2.C
mercury
Hg
(b-k)cmHg
B d cmHg
D (b-d)cmHg
C
(21.) Fo,rt mercury barometers of different crosssection areas have been set up to measure the
atmospheric pressure at different places. Which
:is
\
D
place has the lowest atmospheric pressure?
A
0.01
cmz
B
0.02 cm2
rial.
3as
24.
The pressure ofgas P is greater than the
pressure of gas Qby ^ column of water of
height 8 cm.
The maximum pressure difference that this
manometer can measure is equal to a column
( )
of water of heighf'!2.\.
The diagram below shows a pipette filler used to
fill up a pipette with acid.Which of the following
statements is true?
0.02 cmz
Nozzle X
liquid level
'ts
a
;ide
,22. \he diagram shows a simple mercury
- -' inclined at 60'to the horizontal.
barometer
)
A
nda
Ithe
The atmospheric pressure in cm Hg is
27.4
75.2
A
c
69.3
B
D8o.o
Po is a vacuum.
B
Po has
c
When the noz-zleX is pressured lightly, the
liquid level falls because the pressure in Po
the same pressure
as
the atmosphere.
increases.
(
D If the surrounding
atmospheric pressure
suddenly decreases, the liquid level will not
)
change.
23.
The diagram shows awater manometer made from
wide glass tubing and is designed to compare the
pressure of trvo gases P and
Q
25.
A building is
572 m high. What must be the
minimum water pressure in a pipe at ground level
in order to get water up to a restaurant on the top
floor?
(Density of water = 1000 kg
due to graviry = 10 m
A
C
Which of the following statement is true?
A If the pressure of gases P and Qwere equal,
the meniscus at Y would move down 8 cm.
B The pressure of gas Qis greater than the
pressure of gas P by a column of water
heieht B crn.
of
1x 1ffPa
6x105Pa
--',
acceleration
s-2)
B 5x106Pa
D 5x108Pa (
)
26. When a barometer is taken up a balloor1 the
mercury level
A
B
C
D
falls, because air pressure increases with height.
falls,because air pressure decreases with height.
rises,because air pressure increases with height.
rises, because air pressure decreases with
heioht
-'--b-'-'
27.
The diagram shows awater manometer with one
end connected to the gas tap and the other end
29.
The diagram shows a bubble at the bottom of
pool.
a
left open. If the pressure of the gas increases by
a value equivalent to x m of water pressure and
value equal
atmospheric pressure, P decreases by
a
to )t m of water pressure, the value
increased by
of G will
be
Assuming that the temperature of the pool is
constant throughout the water, which of the
following describes the change of the pressure
and the density of air in the bubble as it rises to
the surface?
Pressure
A
B
C
D
WAIET
manomeler
A (x+)m
C 2(x+y)m
B (x-y)m
D (y-*)^
(
28. Diagram 1 shows a J-shaped tube
30
)
containing
3.0 cm3 of air trapped by mercury. The mercury
levels are the same on both sides of the tube.
More mercury is poured into the open tube until
the levels differ by 76 cm, as shown in diagram
2.'[he atmospheric pressure remains constant at
76 cm of mercurv.
mercury
What is the volume
in diagram 2?
A
C
0.50 cm3
1.0 cm3
V
B
0.67
D 1.50
cm3
cm3
(
Increase
Increase
Increase
Decrease
Decrease
Increase
Decrease
Decrease
(
)
Diagram L represents a mercury-filled simple
barometer as would be used to measure
atmospheric pressure. Diagram 2 shows the
same barometer after a volatile liquid has been
introduced on top of the mercury and a small
quantity can be seen on top of the mercury. The
saturated vapour pressure of the liquid, in terms
of the length of mercury column, is
A [,[/+Y
C Z+X
of the trapped air shown
Density
BY
D Z_X
>fa
31. The diagram shows a mercury barometer on a day
when the atmospheric pressure is 750 mm Hg.
33.
A forked
tube contains air
in one branch
and
vacuum in the other.
+
50 mm
to
)
The pressure of the enclosed air in mm Hg is
c
sure
the
)een
mall
The
:rms
B 150
D600
A.50
nple
:.
::i:
What
(
)
is the pressure at the point P at the bottom
of the mercury column?
A
C
200
OmmHg
750 mm Hg
B 150 mm Hg
D 900mmHg (
\q4 A balloon filled with helium was released from
)
32. As a hydrogen balloon rises from ground level to
an altitude of 300 m, its volume increases.
the bottom of a tall building at sea level. At the
bottom of the building, the balloon had a volume
of 500 cm3,while at the top, the volume was found
to be 510 cm3.
The pressure at sea level is 100 000 Pa. If the
density of air is 7.29 kg m-3, what is the height of
the building?
A 726m
C 752m
B 732m
D 760m
(
)
35. A height of 0.81 m of a column of a turpentine
exerts the same amount of pressure as a heavy box
ofweight of 68 040 N.The base area of the box
10 m2. What is the density of turpentinel
A
C
8400 kg
1000 kg
mr
mi
B 6804 kg mi
D 840kgm{ (
is
)
36. The
Which pressure changes have occurred within
the balloon and the air outside the balloon?
Pressurechange Pressurechange
in the balloon
of air outside
A
B
C
D
Decrease
Decrease
Increase
Increase
pressure of the water near the bottom of the
wall forming a dam to a reservoir does not depend
on
A
Decrease
the depth of the water
B the cross sectional area ofthe reservoir
c density of water
Increase
D
Decrease
Increase
(
atmospheric
pressure
(
)
an
Jt.
The diagram shows a column of air enclosed in
a narrow capillary tube by a thread of mercurv
L2 cm in length.
39. The diagram below shows
a
simple mercury
barometer.
dry air
To find the atmospheric pressure the vertical
distance is measured between
A
C
PandR
Qand
S
B Qand R
D Pands
(
40. The diagram shows the water levels in a water
What is the pressure on the trapped air, given
manometer used to measure the pressure of a gas
that the atmospheric pressure is 76 cm Hg?
72 cmHg
B 64cmHg
supply.
A
C
38.
D 88cmHg
76cmHg
The diagram below shows
(
gas supply
-+
a simple hydraulic
jack.
17 cm
15 cm
How much greater than the atmospheric
pressure is the pressure of the gas supply?
A
C
Which of the following changes will enable
heavier loads to be lifted?
- *-DianietdrofW
(
47.
B
Which one of the following depends
on the
atmosphere exerting pressure?
e
Halved
10 cm
Dianeter of Z
A
CRe
D
water B 5 cm of water
ofwater D t2 cmofwater
2 cm of
-/
/)
\/
A
B
C
-D
A ball falling to the ground
Drinking through a straw
The sprayfrom a can cola
Bath water emptying down
a
plug hoie
(
'cury
42.
piston of negligible weight encloses air in a
cylinder as shown. The ai- expands and the piston
moves 4 cm upwards. What will be the pressure of
air inside? (Atmospheric pressure of air inside is
A
44.
100 kPa.)
The diagram above shows
a
manometer
is
connected to a gas supply.
The liquid levels on both limbs of the manometer
'l
rise to a height difference of /. What changes
would make the value of h larger?
A Increase the cross sectional area of the limbs
B IJse another liquid which has a lower densiry
C Use another liquid which has a higher densiry
D Carry out the experiment on a planet which
2 cm
a stronger
A
C
vatet
a 8as
't-
::
=:'
25Wa
75l<Pa
B 50 kPa
D 100kPa (
one minute, a deep-sea diver breathes L litre
of air at an atmospheric pressure of 100 kPa. At
a certain depth in the sea, the pressure of the air
)
is contained in a container of base area
Ar,up to height br.Water is also contained in a
second container of bigger base area A, b:ut ttp
to a smaller height hr.-Ihe hydrostatic pressure
exerted on base A, is P, whiles that exerted on
base A, is Pr. Which of the following statements
supply is 300 kPa.To breathe in the same mass of air
in one minute. what volume of air would he need?
Aa
Water
+J.
is correct?
)
In
45.
)
(
graviry
A
C
f
u,,.
1 litre
B tn,,
(
D 3litres
)
46. The diagrams below show air trapped in a capillary
tube by a small mercury plug. The length of the
mercury plug is 10 cm. The atmospheric pressure
is 76 cm Hg.
C
trapped air
()
trapped air
42
A1
r
the
A
It is possible that P, = PrsinceAr> Arznd
,bz
B
Pr,
Prbecause Ar>
h,
A,
c Pr' PrbecauseAr> At
D Pr'Ptbecause hr'h,
()
tl
'
The pressure of the trapped column of air in
II is given by
A
B
C
Diagram I
1OcmHg
10 crn Hg
76 cmHg
Diagram II
76 cm Hg
86 cm Hg
10 cm Hg
I and
(
+7..1-Ihe diagram below shows a U-tube containing
and oil. Given that the densiff of water is
1000 kg m-3, what is the density of oil?
v-7tnr^1r,
v
i/\n
{0or(ot' o ; '"Sccq) 'J
50.
8'0 cm
tCc
A
long tube sealed at one end is fiIled with
mercury and then placed vertically with its
open end dipping below the surface of some
mercury contained in a dish that is opened to the
lcc'
atmosphere.
The tube is found to be full of mercury. Which of
the following could explain this fact?
A Air is introduced into the tube during the
transfer to the dish.
B The capillary effect makes rhe mercury fill up
A
0.80 g cm-3
C 0.90 g cm 3
the tube.
C The tube is 600 mm long.
D The tube is narrower at the bottom than at
the top.
7.25 g cm'3
D 1.11 g cm-3
B
Some air is trapped in a mercury barometer
shown in the diagram below.
as
51. The diagrams below show the same thin tube
containing air trapped by a mercury thread, held
positions, P, q R and S. The
diagrams are not drawn to scale.
in four different
trapped air
o
In which order must the diagrams be placed
(from left to right) to show that the volume of
the trapped air is increasing?
A PqRS
c RSPq
A
L
?{
wall
B
wall
52.
B SPqR
D Q_RSP (
)
A ladyweighs 500 N and wears stiletto shoes.The
area of the stiletto heel is 0.0001 m2.
The pressure the lady exerts by standing on one
stiletto heel is
5000 N m-2
200 N m-2
5 000 000 N m-2
500 000 N m-2
E
B
D
A
C
(
=
()
53. Assume that the atmospheric Pressure at
with
h
its
vary with height. If the a.vet^ge density of air is
I.2 kg m-3 and that of mercury is 13 600 kg --t,
the atmospheric pressure at 3400 m above the sea
some
o the
ch
of
level is equal to the pressure exerted by
A 1.060 m of mercury'
B 0.460 m of mercurY.
C 0.760 m of mercury.
D 0.300 m of mercury.
le
ill up
at
sea
level is equal to the pressure exerted by 0.76 m of
mercury and the acceleration of free fall does not
54.
Which one of the following statements about
them is correct?
A
B
Acolumn of gas is slowly compressed as shown in
the diagram below.
C
D
.F-
They each have the same pressure on the base.
The vertical-sided vessels have the greatest
pressure on the base.
Vessel (iv) has the least pressure on its base.
Vessel (i) has the greatest pressure on its base.
//
)b. The apparatus shown is connected to a gas tap in
order to measure the pressure of the gas. The tube
P contains water and the tube Qcontains some
other liquid, the liquid levels in the tubes being
originally at X.
gas
Which of the following graphs corectly shows
the relation between the gas Pressure P and the
length of the gas column /?
AP
1_
h
1_
h
)
s.The
55
The following diagrams show, to the same scale,
the vertical cross-sections of each set of vessels.
A11 of the vessels have circular horizontal crosssections. Thev all contain water to the same level.
When the gas is turned on, the water in the open
limb of P rises to a higher level than that of the
liquid in the open limb of Qas shown in the
above diagram. This is because
the liquid in Qis denser than water.
A
B
C
D
tube P is closer to the gas inlet than tube Q
there is more liquid in tube Qthan in tube P.
the pressure of the gas ercitcd on P is hig['.cr
thar-r the pressLlre of tite gas cxe rie.l on Q
57. In
an experiment to investigate the relationship
between the volume V of a fxed mass of gas and
the pressure P, a graph of PV against P is plotted.
Which one of the following graphs shows the
correct relationship at constant temperature?
APV
59. The diagram shows a mercury barometer. The
height h of the mercury column is recorded.
BPV
4
The barometer is set up on another planet where
the atmospheric pressure is half that of Earth and
the gravitational field strength is double of that
,.-on Earth. Which is the height recorded?
B
0.5b
D2h
58.
60.
The diagrams (a) and (b) show an open-ended and
a closed tube manometer connected (at different
The pressure exerted by a water
is 20 MPa (20 000 000 Pa).
times) to the same gas cylinder.
The mercury barometer reads 760 mm. Assume
that there is no loss in the pressure from the gas
():
je
t of
area
5 mm2
5 mm2
water jet
cvlinder.
What is the force exerted on the ground if the jet
of water strikes the ground vertically?
A
C
(a)
(b)
What is the height x of the mercury in diagram
(b)?
A 100 mm
C 760mm
B 660 mm
D 860mm (
)
1x102N
1x106N
B 1x10sN
D 1x108N (
)
The
Unit 7
Temperature
L
). The temperature reading on the thermometer
The length of the alcohol thread in a thermometer
is 3 cm at ice point and 5 cm at a temPerature of
10 oC. What is the length of the alcohol thread
when the thermometer is placed in pure boiling
shown in "C is
,
20cm
water?
A 23cm
C 46cm
here
B
35 cm
D 50 cm
2. Which of the following is not an advantage
and
)
-
Ttm2
3.
Alcohol has a large expansivirY.
Alcohol has a low freezing point.
Mercury has a high boiling Point.
Mercury has a high freezing point.
o'
(
(
D6s
c60
liquids?
A
B
C
D
855
A50
of using mercury or alcohol as thermometric
that
The diagram below shows temperatures on a
mercury-in-glass thermometer. Which temperatures are the upper and lower fixed points?
)
is given a thermometer that reads -1 "C
fixed point and 99 "C ior the uPper
lower
for the
fixed point. He uses the thermometer to measure
the temperature of some water before and after
heating.Which of the following correctly describes
the temperature recorded by the thermometer as
compared to the actual temperatures of the water
A student
before and after heating, and the temperature
difference recorded by the thermometer and the
actual temperature difference?
e
jet
A
B
C
D
\
Reading
before
heating
Lower
Lower
Lower
Higher
Reading
after
heating
Lower
Higher
Lower
Higher
Temperature
Difierence
Low
High
Same
Same
(
4.
The lengths of mescury thread in the uniform
tube above the bulb of a mercury thermometer
0"c
-10'c
are:
30 mm when the bulb is in melting ice;
180 mm when the bulb is in the steam above
boilingwater;
12 mm when the bulb is in a liquid.
What is the temperature of the liquid?
_12.0.C
-8.0
6.7 "C
A
c
"c
B
D Bo'C
(
Upper fixed point
Lower fixed point
-11
110'c
00c
R
110
C
100'c
,1
)
)
"c
"c
0"c
-10
7.
The fact that the level of mercury in a mercuryin-glass thermometer rises when the temperature
of the thermometer is raised shows that
A glass is a poor conductor ofheat.
B glass does not expandwhen heated.
C glass expands less than mercury when heated'
D
8.
13.
situations.
Length in melting ice = 20 mm
Length in steam above boiling water = 170 mm
Length in liquid X = 50 mm
What is the temperature of liquid X?
25"C
zO"C
mercury expands uniformly with a rise in
(
temperature.
A
)
C
The distance between the 20 "C mark and the
100'C mark on a mercury thermometer is 25 cm.
When the mercury level is 5 cm below the 100 "C
mark the temperature is approximately
A
c
B
75"C
84"C
80"C
D90"c
(
-.
)
temperature is raised by 10 K?
B 10 cm3 of copper
A 10 cm3 of air
D 10 cm3 of water
C 10 cm3 of ice
()
)
reason for not using water as a
thermometric liquid in thermometers is because
10.
3O'C
B
D 33.3"c (
t4. Which of the following expands most when its
9. The main
A
B
C
D
The lengths of mercury thread in the stem
of a mercury thermometer are given in three
15
it is costly to dye it
its expansion is not uniform
it wets glass
its boiling point depends on external pressure
The bulb of a mercury thermometer is placed first
in melting ice (at standard pressure), then in steam
(at standard pressure), and last in a liquid X. The
lengths of mercury thread in the uniform tube
above bulb, in three cases' are 20 mm, 170 mm, and
50 mm. What is the temPerature of X?
A
c
()
The following are the results obtained for the
calibration of a mercury thermometer.
The lengths ofthe mercurycolumnwhen immersed
in melting ice and steam above boiling water are
2O"C
29.4"c
B 77.6"C
D 33.3"C
(
)
t6. The diagrams show the positions of mercury
threads in a thermometer placed in pure melting
ice and boiling water.
9.0 cm and 44.0 cm respectivelY.
What temperature would the thermometer record
if the length of the mercury column is 23.0 cm?
25"C
A 1OOC
c
11.
B
D65"C
400c
(
absolute zeto of temperature'
the Celsius temperature is zero;
the average kinetic energyofthe particles
a substance is minimum;
ilI the Kelvin temperature is -273 K.
Which statement(s) is/are correct?
At
I
II
A I only
C IandII
12.
)
.
B II only
DIIIonly
(
of
boiling
water
)
Alaboratorythermometer can be made to measure
temperature more accuratelY bY
A having a smaller bore at the stem
B using thinner glass at the bulb
C painting one side of the stem white
D making the stem cylindrical in shape
"C mark on
What is the distance between each 1
the thermometer?
A 0.22 cm
C 2.0 cm
B
D
0.24 cm
2.2 cm
77.
liquid is cooled from7\ "C to 30 "C. the
molecules of the liquid
A decrease in energy and move more slowly
B increase in energy and move more quickly
C contract and move more slowly
D contract and move more quicklt
When
a
24.
A thermocouple is constructed by putting the two
soldered ends (unctions) of t'wo different metals
into different ternperatures.
,
18. The resistance of a piece of platinum wire in pure
melting ice is 800 Q. The resistance of the wire in
steam is 910 O. What would the temperature be
when the wire has a resistance of 1000 Q?
A
c
55'C
782"C
B 110 "C
D 222"C
(
o
The galvanometer shows a deflection
)
depends on the temperature difference between
the junctions P and Q(see below).
)
19.
t
.I
c
that
The liquid used in a liquid-in-glass thermometer
should not
,A have a large specific heat capacity
B have a large conductiviry of thermal energy
C expand uniformly with temperature
( )
D have a large expansiviry
Temperature
difference
between P
and Q/'C
120
20. Which of the following properties of materials is
not desirable for liquid-in-glass thermometers?
A High melting point and low boiling point
B
C
D
100
80
Good thermal conductor
Not transparent
Absorbs small amount ofinternal energyfrom
()
objects
20
0
21,. Internal energy of a body is
A the total kinetic energy of all the particles in
the body
B the total potential energ'y of all the particles
in the bodv
C the total kinetic energy and potential energ"y
of all the particles in the body
D the energy needed to keep the internal part of
the body at room temperature
()
051015202530
Deflection on meter/mV
If P is placed in a substance of 20 oC and Qis
placed in another substance of higher temperature,
a deflection of 30 mV is seen. What is the
temperature of
A
c
22. Which one of the following thermometers would
be most suitable for monitoring the temperature
of gases in a factor!. chimney if the temperature
can vary over a range of 200 K in a minute?
A
B
C
D
aa
.J
Alcohol-in-glassthermometer
Mercury-in-glass thermometer
Thermocouplethermometer
Platinum resistance thermometer
(
"c
B
720"c
Q
B 25"C
D 140"C
(
)
A
thermocouple attached to a milli-voltmeter
mVwhen it is immersed in ice at 0 "C and
5.0 mV when immersed in steam obtained from
waterboiling at 100 oC.Whatis the temperature of
awarmliquid if the milli-voltmeter reads 3.8 mV?
reads 0
A
)
Aniline melts ar -6 "C and boils at 184."C. At
u'hich temperarure is eniline a liquidi
-50
-to Je'
A
25.
2O"C
38'C
C 62"C
B 60'C
D76"C
(
)
26.
An
un-graduated thermometer is fixed onto
a
32
ruler. Its mercury column is 8.0 cm long at the ice
point,20.5 cm long at the steam point and 5.5 cm
long in a mixture.
What is the temperature of the mixture?
A 44"C
2O"C
c
27.
-20"c
B
D -4ooc
Element
(
B
C
)
D
aa
28. Mercury is used as the thermometric liquid in
many thermometers because it
29.
freezes at a low temoerature
has a high density
expands uniformly when heated
has a high specific heat
capaciry
(
30.
thermometer
(
)
c 7ta
Dr52a
(
a
-101
-J)
1540
2470
J)/
-39
()
properties of material is
Good thermal conductor
Not transparent
Absorbs small amount of internal energy from
(.r
Some water in a beaker is placed in an inverted
bell jar which is connected to a vacuum pump.
Before the vacuum pump is set in operation, the
thermometer reads room temperature. As air
is gradually pumped out of the bell jar, what is
observed?
A
B
28A
46A
The length ofthe mercurythread in
2470
not desirable for liquid-in-glass thermometers?
High melting point and low boiling point
35.
resistance?
31.
600
objects
Mercury-in-glass thermometer
Clinical thermometer
Thermocouple
The resistance of an alloy wire is 25 Q when
it is placed in a cup of melting ice. At room
temperature of 28 "C, the resistance is 38 Q. If
the wire is put in boiling water, what will be the
A
B
Chlorine
Iron
Mercury
The main disadvantage for not using water as a
thermometric liquid is that
A it is colourless and so it needs to be coloured
B it wets glass
C it is too common
( )
D its expansion is irregular
A
B
C
D
)
temperature?
Alcohol-in-glass
Boiling
Point/"C
34. Which of the following
Which of the following can measure the highest
A
B
C
D
Melting
Point/"C
A Aluminum
What propeffy of mercury does NOT contribute
to it being chosen as a thermometric liquid?
A Mercury has a high boiling point.
B Mercury has a high densiry.
C Mercury is a good conductor of heat.
D Mercury does not wet glass.
( )
A
B
C
D
The table gives the melting and boiling points
of four elements. Which element is a liquid at
1000 "c?
)
thermometer
is 12 mm when in pure melting ice and 92 mm
when in steam. What is the temperature when
C
D
The water starts to boil while the
thermometer registers room temperature.
The water starts to boil while the
thermometer registers a value higher than
room temPerature.
The water starts to boil while the
thermometer registers a value lower than
room temperature.
The water starts to freezewhile the
(
thermometer registers 0 "C.
)
the length of the morcury thread is 52 mm?
A 50.0'c
c 63.0 0c
B 57.5 "C
D 72.5"C (
)
36. When ice changes into water at 0 "C,
I workis done breaking the molecular structure
of ice in solid state.
II
III
internal energy is increased.
energy is absorbed to raise the temperature.
A I only
c I and II
only
B
D
II only
I, II and III
37.
Three liquids with their respective boiling and
freezingpoints are shown in the table below.
FreezingPoint BoilingPoint
Mercury
Alcohol
Pentane
"C
-712"C
-180 "C
-39
A thermometer that can
with
A
B only mercury
C only alcohol
D either alcohol or pentane
)
d
P.
re
ir
is
78"C
36.5 "C
measure both
oC should be filled
and 38
only pentane
o
357 "C
-50 "C
38. On the Kelvin scale, what will our
temperature of
A
c
236K
336K
37'C
be?
B
D
31OK
41OK
body
Unit B
Heat Capacity and Latent Heat
A IandII
B II andIII
C I andIII
D I, II and III
Water of mass 0.87 kg at 90.0 "C is poured
into an insulated metal container of mass
0.50 kg at20.0 oC.The final temperature ofwater
is 86.2 "C. If the specific heat capacity of water is
4200 J kg-t l1-t, what is the specific heat capacity
of the metal?
A
C
360Jkg1Kl
B
420Jkgt11-t
D
6. A metal bar is heated.
380 J t<g-t 6-t
480 J kgt 11-t (
2. An immersion
heater connected to a kilowatthour meter is used to supply heat to 4.0 kg of
oil.The initial reading of the kilowatt-hour meter
is 10.95 kwh. After heating, the meter reads
11.03 kwh. Fjnd the rise in temperature
of the oil. (Specific heat capaciry of oil is
3000 J kg
A
C
3.
'K ')
0.0070'c
24"C
B 2.4"C
D 720"C
Which quantity stays the
(
A
B
C
D
)
When equal masses of water and paraffin are
heated at the same rate, the temperature of the
paraffin rises faster because paraffin has
A
B
C
D
a greater specific heat capacity
a lower specific heat capacity
high boiling point
a lower densitv
a
7.
-.
Tlre
The
The
The
ofvaporisation of the liquid is
kgl
10'Jkg'
S, each receive the
same amount of hpat. The mass of R is twice that
S.
What statement(s) about R and S
isy'are
correct?
I
II
III
The specific heat capacity of R is twice the
specific heat capacity of S.
The temperature rise of R is half the
temperature rise of
(
)
Which of the following objects has the biggest
temperature increase if 54 000 J is supplied to
A
B
c
D
B 5xldJkg-l
D 2.5 x 706Jkg-t
- Two blocks of copper, R and
).
of
l
I
each?
A kettle of power 2000 W boils away 0.2 kg of
liquid in 250 s. From this, the specific latent heat
103J
l
cross-sectron areaA of the bar
length / of the bar
internal energ'y of the bar
heat capacity of the bar
Mass/kg
A
C
same?
S.
The heat capacity of R is t'nrice the heat
capacity of S.
Shape
0.5
0.5
Spherical
Cubic
7.2
7.2
Spherical
Cubic
Specific Heat
Ctpacity
/
Jkg-loc-l
2550
780
780
2550
()
A
heater supplying energ'y at a constant rate of
0.5 kW is completely immersed in a large block
of ice at 0 "C. In 22 minutes, 2.0 kg of water at
0 oC are produced. What is the specific latent
heat of fusion of ice?
5.5 J kg'
330 J kg1
5500J kgl
330 000J t<g-t
A
C
B
D
()
9
piece of lead is allowed to fall to the ground
and as a result of the impact, its temperature rises.
The final temperature of the lead depends on each
of the following excePt
A the height through which it falls
B its specific heat capacity
A
C
D
its mass
its initial
(
temperature
)
The characteristic of certain cooking pots is that
when they are remo.'rd from the source of heat,
the contents may continue to boil for a long
trme.
The explanation for this effect is
A
B
)
After the
liquid has reached the boiling point, it is heated
for a further 15 minutes and during this time
3.0 g of condensed liquid is collected. Which
of the following is required in order to find the
specific latent heat of vaporisation?
10. A liquid
72.
C
D
is being heated in a setup below.
the pot is made of very good conductor for
material
the pot is made of very good insulator for
material
the pot has a very high specific heat capacity
the pot has a very low specific heat capacity
()
13. An immersion
heater of power 800 W raises the
temperature of 1 kg of water by 20 "C in three
minutes. How much energy is wasted? (Specific
heat capaciry of water rs 4 200 J kg t 'C t)
2 400J
44 000J
vacuum flask
A
c
60 000J
B
D 84oooJ (
)
14. An electric heater of power 1 kW is immersed
in 2.0 kg of water for 4 minutes. If the initial
temperature of the water is 20 "C, what is its final
liquid
temperature at the end of
4 minutes? (Specific
heat capacity of water is 4200 J kg-t og-t;
28.5 "C
48.5'C
50.5 "c
thermometer
A
c
B
D 60.5'C
(
)
heating coil
15.
,est
to
at
c
eof
tock
it at
tent
A
c
The resistance R
The heat capacity ofthe apparatus
The power consumed
11. When a 2.0 kg block of metal at 600 "C
of heat of fusion of ice, in J 91, is
240
C
7.62 x
9.20 x
ro2
1o'r
B 7.67 x ro.
D 9.20 x 1or (
A5
c 300
is
immersed in water at its boiling point (100 .C),
0.4 kg of steam is produced. Asrume that there
A
B 35W
D14oW
(
)
is switched on, 10 g of water is collected from
the melting ice in 1 minute. When the heater is
switched on, the mass of water collected from the
melting ice in 1 minute is 50 g.The specific latent
B The boiling point of the liquid
D
14W
70w
76. A heater of power of 200 W is immersed in a
filter funnel of crushed ice. Before the heater
condensed liquid
)
a 2 kg block of
aluminum of specific heat capacity 840 J kg-t "g-t
and the temperature rises 5 "C per minute. The
power of the heater is
A
long delivery tube
I
An immersion heater is placed rn
77.
An air gun pellet,
(
)
mass tn and specific heat
capacity c, hits a steel plate at speed o. During
the impact, 50%o of the pellet's kinetic energy is
converted to thermal energ'y in the pellet.
What is the rise in temDerature of the oellet?
A;.
-t!
)
B
D1200
'It
BT
*oi
18.
Which of the following pairs of object have
22. Four liquids of different
masses are heated to the
same temperature by identical heaters. The time
taken for each liquid to reach the designated
temperature is listed below. Which liquid has the
largest specific heat capacity?
different specific heat capacities?
A 1 kg of water at 15 oC and 1 kg ofwater at
30
B
"c
A rectangular block of aluminium of mass 1 kg
and a cylindrical block of aluminium of mass
Mass
1kg
C
D
79.
A
B
c
D
oil in a glass container and 1 kg of oil
in a metal container
1 kg of solid naphthalene and 1 kg of liquid
1 kg of
(
naphthalene
)
A
400 W heater is used to heat 0.4 kg of solid.
The temperature-time graph of the substance is
shown below. What is the specific latent heat of
fusion of the substance?
ofliquid/
23.
Time ttken/
kg
minutes
1.5
6
2.0
3.0
7
3.5
9
12()
The diagram shows two blocks of aluminum, R
and S. The mass of R is half the mass of S. The
temperature rise of S is half the temperature
rise of R when the same amount of heat, W, is
supplied to each block.
E
f
ct
o
E
,q)
t
W
Which statement correctly explains the
100
A
c
a00 kJ t<*-t
64 kJ kg-1
B
D
150kJkg1
500 kJ
ks-l (
)
20. What is the final temperature
reached if 7700J of
energ'y is used to heat up 3.0 kg of water, initially
at 10.0 "C? (Specific heat capacity of water
4200J k-1oc-l)
A
c
10.4 "C
10.6 0c
B 10.5 "C
D 10.7"C (
is
)
27. An object A has a mass of ml<g and specific heat
capacity rJ kg-t K-l and temperature = 60 oC.
An object B has a mass of 2mkg and specific heat
capacity 2tI lg-t K-l and temperature = 30 "C.
If objects A and B are'brought into thermal contact,
whatwill be the final temperature reached? Assume
that no heat is lost to the surroundings.
A
2O"C
C 45"C
B 36"C
D5o"C
(
)
observation?
A The heat capacity of R is half the heat
capacity of S.
B The heat capacity of R is twice the heat
capacity of S.
C The specific heat capacity of R is half the
specific heat capacity of S.
D The specific heat capacity of R is twice the
specific heat capacity ofs.
(
)
24. Hot
water at 100 "C is added to 5 g of ice at 0 "C.
What is the minimum mass of hot water needed
to melt the ice? (Specific heat of fusion of ice is
336 J g-r and specific heat capacity of water is
4.2J g-r11-11
0.8 kg
4.05
A
C
16.8 g
B
D 70.69
(
)
30.
TC
IC
Water in
a container is boiled using an immersion
heater for 1 minute and 15 seconds. It was found
that 2 g of the water had been converted into
steam. If the power of the heater is 60 W and
the heat loss to the surrounding can be neglected,
what is the specific latent heat of vaporisation (in
t)
J kg of water?
A 4.44x707
B 2.25 x 10-7
)d
le
c
A metal ball is released from the top of a track at X
as shown above. It finally stops at point Y because
of friction between the metal and the track.If the
work done against friction is all converted to the
thermal energy of the ball, what will be the rise in
temperature of the ball? k = 10 m s-2 and specific
og-t;
heat capacity of metal = 400 J kg-r
B 1.5'C
A 0.7 "C
R
he
lre
,is
c
..:
!:=
6.7
"c
D e.Boc
(
water at 100 "C is added to 300 g of water at
until the final temDerature is 40 "C.The mass
of hot water added must be at least
0 "C
60g
C 180g
B I20g
D2009
(
.e
\
lo(1
:ded
ce ls
er is
A C=+
B
C C=m?
D C=nc
for the temperature to drop from 15 "C to 0 "C.
However it takes a further 2 hours before the ice
is comoletelv frozen.This is due to
A the specific latent heat of fusion
B ice being a better conductor of heat than water
C ice being at a lower temperature than freezing
water
D the specific latent heat ofvaporisation ofwater
()
32. Why
is water used as a coolant in the radiator of
motor car?
A Water is non-volatile.
B Water has a high specific heat capacity.
C Water has a high specific latent heat of
vaporisation.
( )
D Water is non-corrosive.
a
)
c
33. Some ice is placed in a beaker and is heated until
c=rnC
(
)
31. If a tray of water is placed in the freezer unit of
a refrigerator it takes approximately 20 minutes
27. Which of the following equations correctly relates
the heat capacity C, the specific heat capacity
and the m ss rn ofthe substance?
D 2.25x106 (
)
26. Hot
A
2250
the beaker contains boiling water. The graph
shows the temperature of the beaker and its
)
contents during the experiment.
28. Two identical objects are heated up to 100 oC
and placed in two covered styrofoam cups filled
with nvo different liquids. Liquid X has twice the
heat capacity of liquid Y.The final temperature of
liquid X compared to liquid Y after 5 minutes will
A be higher
B be equal
C be lo-wer
D depend on mass of the objects
(D
(U
q)
oE
P
29. Which of the following
statements is true when
body P is at a higher temperature than Q!
A Body P has a larger h eat capacity than body Q
B Body P has more internal energy body Q
C Body P loses thermal energl, faster than 6ody Q
D Body P loses rl-rermal energv to body Qwhen
()
they are in contact.
Tme
Between which two points on the graph does the
beaker contain a mLrtr rr-e ofliqrrid rnd 3r.)
A VandW
C XandY
B W ar.rd X
D YandZ
(
)
34. An immersion heater
rated 300 W supplies energy
to 1 kgofwater
7 minutes.The specific
^t25.}ocfor
heat capacity of water ts 4200 J g-t K-t. The final
oC is
temDerature of the water in
27.0
25.5
55.0
30.0
B
A
c
J).
40. The diagram shows
heated to 100 oC.
At
a steel ring that has
been
this temperature the internal
and external radii of the ring are
the steel ring is cooled at 0 "C,
r,
and rr. When
D
An immersion heater is used to heat a cup
of water. It takes 10 minutes to bring the water
from 20 "C to its boiling point 100 "C. End the
time taken for the heater to vaporise the boiling
water completely. (Specific heat capacity of
water = 42001g-t K-t and specific latent heat of
vaporisation of water = 2.268 x 106 J kg 1)
A 54 minutes
B 60 minutes
U b/.5 mrnutes
D 77.5 minutes ( )
36. Thermal energy is supplied at the same rate to
100 g of alcohol and 100 g of water in similar
containers. The temoerature
faster. This is because alcohol
A
B
C
D
37.
rises
is less dense than water
evaporates more readily than water
is a better conductor ofheat
has a smaller specific heat capacity than water
()
Less thermal energy is needed to raise the
temperature of 1 kg of copper by 1 "C than that
needed to raise the temperature of 1 kg of water
by 1 'C. This is because copper
A
B
C
D
38.
of the alcohol
has a lower specific heat capacity
is a better conductor ofheat
has a higher density
cannot transfer heat by
convection (
A
B
C
D
r, decreases and rrdecreases
r, decreases and rrincreases
r, increases and rrdecreases
r, increases and rrincreases
(
)
47. Cooling water enters the heat exchanger in the
turbine hall of a nuclear power station at 6 oC and
leaves at 14 "C.The specific heat capacity of water
is 4 200J Ft K-t.If the rate of heat removal by the
water is 6.72 x
10e J
ofwater flow?
6.72x\0ex60
A
4266-,
6.72
"
g
per minute, what is the rate
kgs-t
70
)
Ice cubes are good for cooling drinks because ice
has
A
B
C
D
39.
low latent heat of fusion
high latent heat of fusion
"
a low latent heat ofvaporisation
a high latent heat ofvaporisation
a
The temperature of water boiling in a beaker can
be reduced by
A adding sugar to the water
B boiling the water on a high mountain
C increasing the pressure in the beaker
D heating the beaker less strongly (
42. How many joules of heat are required to melt
50 g of ice at 0 "C?
(Latent heat of fusion of ice is 3.36 x 10tJ kg t)
A 1.68 x 10a
B 1.68 x 10s
D 1.68 x 10i ( )
C 1.68 x 106
':1::,
TI
Unit 9
il
Kinetic Model of Matter
n
7.
Over a particular temperature range, a volume
of liquid expands more than the same volume of
solid because liquid molecules, compared to solid
5.
I
II
are less dense
III
arelarger
move faster
exert smaller forces on surrounding molecules
^verage
a
J.
the
md
A
B
C
D
6.
to
the volume of the gas increases.
the average speed of the gas molecules
lncreases.
the average separation of the gas molecules
lncreases.
I only
II only
II and III
onlv
(
I,II and III
)
Smoke particles suspended in the air are viewed
through a microscope. The path of a specific
particle can be traced
()
Solids and liquids are difficult
of fixed mass is heated under constant
Which of the statement(s) above is/are correct?
()
Ifagas in an enclosed spaceis suddenlycompressed,
which of the following is unchanged?
A The number of molecules in the soace
B The density
C The temperature of the gas
kinetic energy of the gas
D The
a gas
pressure.
molecules,
A
B
C
D
When
as
follows.
compress, but
gases are easy to compress. This is because gas
molecules, compared to solid and liquid molecules,
rter
the
:ate
A
are moving very
B
are arranged in a random manner
are spaced far apart
c
rapidly
in
space
D atevery numerous
4.
)
Tlelt
ks-)
)
What causes the random jerky path of the smoke
particlel
A Air molecules colliding with the smoke
When ice changes into water at 0 "C,
I work is done in breaking the molecular
structure ofice in solid state.
II internal energy is increased.
III energ'y is absorbed to raise the temperature.
B
C
D
Which of the statement(s) above is/are correct?
A I only
B II only
C I and II only
D I,II and III only
,7
particle
Convection currents in the air
Small change of pressure in the air
Small changes of temperature of the air
()
When the temperature of a gas rises at constant
volume, its molecules
A move with greater average speed
B' collide with one another less often
- C move at a constant acceleration
D move at a constant deceleration (
)
8.
In terms of the simple kinetic theory of matter,why
does temperature increase as a liquid is heated?
A The collision rate of molecules increases.
B The interaction between the molecules
C
D
9.
13.
Which of the following graphs best illustrates the
behavior of a fixed mass ofgas undergoing changes
in volume and pressure at constant temperature?
B
A volume
volume
becomes stronger.
The average speed of the molecules increases'
spacing between the molecules
The
^verage
( )
larger.
becomes
When air is pumped into a bicYcle tYre ^t ^
increases
constant
temperature,
C
because
A
B
C
D
pressure
pressure
the pressure
D
volume
volume
more molecules are hitting the inner surface
of the tYre
the molecules are closer together
the molecules are moving faster
the molecules have more kinetic energy
()
pressure
pressure
()
10.
The volume of a fixed mass of gas in a cylinder
is increased at constant temperature' The pressure
exerted by the gas molecules decreases because
A
B
A
the density ofgas decreases
the gas molecules collide with each other less
B
frequently
C
D
C
there is a larger area
D
contact with the gas
the gas molecules strike the cylinder walls
less
frequently
high speeds
ofthe cylinder in
(
)
shows that
air molecules exist and can reflect light from
the light source into the microscope
air molecules move about randomly and at
74. Brownian motion
15. A
smoke Particles behave like air molecules
smoke particles and air molecules move
(
about randomly
)
sealed test-tube contains a gas at atmospheric
and room temperature. When it is
surrounded by ice, which of the following
statements about the gas in the tube is NOT
pressure
11.
In a Brownian motion experiment involving smoke
particles in the aiq heavy particles setde quickly
but very small particles remain suspended for
correct?
A
long periods of time.This is because
A air pressure has a greater effect on smaller
C
D
random molecular bombardment by air
molecules keeps the Particles suspended
the Earth's gravitational field does not act on
very small particles
the small smoke particles have the same
( )
density as air.
D
a
the1, gain energy from tire heat.
'fhe air molecules inside it move faster when
D
ofthe test-tube.
The average number of molecules per
cm3
becomes smaller.
t6.
balloon increases if the pressure inside
t2.
it increases. The balloon will get bigger if it is left
in the heat of the Sun. Why does this happen?
A The number of air molecules inside it increases.
B The air molecules inside it are all moving
outwards.
C The air molecules inside it are bigger rvhen
The size of
C
B
particles
B
The average speed of the molecules becomes
lower.
The average kinetic energy of the molecules
becomes lower.
The molecule collides less often with the wall
sample of air at 27 "C occupies a volume of
0.30 m3. If the temperature rises to t27 "C but
the air pressure is kept constant, what volume will
the air now occupy?
0.23 m3
0.054 m3
)
0.4 m3
A
A
C
B
D 1.4m3
(
Which of the following does not increase
paint
e
:
:S
)
":::iiit)
A
gas under
pressure
Which statement correctly explains what happens
to a used spray paint can if it is thrown into a fire?
A It would not explode since it contains no
flammable paint at all.
B It may explode as heat from fire may cause
the remaining paint to expand and explode.
It
C would not explode as the high pressure
within the can prevents any evaporution of
the paint even under extreme heat.
It
D may explode as evaporated molecules of
the remaining paint may result in a pressure
( )
too large for the can to handle.
\
21..
Which of the following gives the state of matter in
which molecules, at a given temperature, have the
highest speed and the greatest force of attraction
3r1C
is
irg
CT
A
B
C
D
s
molecules
6xed mass of gas is compressed wnile kept at
constant temperature. How do the properties of
the molecules of the gas change?
Average Frequencyof Average
collision distance
speed of
apart
molecules with walls
increases decreases increases
increases increases unchanged
increases decreases unchanged
unchanged increases decreases
(l
In an experiment to demonstrate Brownian
motion in a gas, a brightly illuminated cell
containing smoke is viewed under a microscope.
between them
experiment is correct?
Gas
Gas
Solid
Solid
Solid
Gas
Solid
A
B
(
C
)
D
mass is heated under constant
Light is being scattered from the gas molecules.
Motion ofthe gas molecules is being observed
directly.
The larger the smoke particles, the greater
the agitation of a given speck of light.
The higher the temperature of the gas, the
faster the motion of a given speck of light.
()
the volume of the gas increases.
the average speed of the gas molecules
increases.
III
23.
A
24.
What happens to the air in a car tyre
the average separation of the gas molecules
decreases.
Which of the statement(s) above is/are correct?
A I only
C II and III
)
A
Pressure,
I
II
(
Greatest force
Gas
t9. When a gas of fixed
The average speed of the gas molecules
The average distance between the gas
The observer sees a. large number of bright
specks of light undergoing random, jerky motion.
Which one of the following statements about this
between them?
Highest speed
C
D
A
B
C
D
22
18.
B
The average number of gas molecules hitting
the cylinder walls per second
The average kinetic energy ofthe gas
molecule
TTftI
fo
as the
gas is heated?
_:_-_--_
B IandII
D I,II and III (
20. A gas in a sealed container is heated.
given mass of air occupies 72 m3 at normal
atmospheric pressure. If the pressure is increased
to 4 times the original value without changing the
temperature, what volume will the air occupy?
B 6m3
A 3m3
( )
D 48m3
C 24m3
)
as a result
of
a motorway journey?
A
The temperature remains the same and the
pressur€ increases.
The temperature decreases and the pressure
lltcfeases.
D
The temperatttre and pressure both increases
The temperature remains the same and the
25.
Brownian motion is often demonstrated by
viewing illuminated smoke particles, contained
in a sealed transparent cell, through a low power
microscope. Which of the following statements is
28.
Which of the following correctly
properties of solids,liquids and
Solids
Liquids
A Do not flow
Flows
NOT
A
correct?
Small specks of
light are seen to move about
B
in a random motion.
B
C
The illumination enables the observer to see
the actual molecules.
The observed motion is caused by random
An explosion
can occur
if
an aerosol can is left
in
direct sunlight. What causes the explosion?
The gas molecules in the can expand.
The gas molecules in the can move faster.
A
B
C
D
27.
The can radiates heat faster.
The can expands.
(
easily
Easily
Easily
Hard to
compressed
comPress
FIxed
Fxed
No fixed
shape
shape
shape
D
No fixed
volume
Fxed
volume
No fixed
volume
observed
C
)
Which one of the graphs shows the correct
BPV
()
Smoke particles are used to observe Brownian
motion because
A we can produce smoke easily
B smoke particles are bright enough to be
D
the density of smoke particles is as small
that of air
smoke particles only move horizontally
and
an experiment to investigate the relationship
between the volume V of a fixed mass of gas and
pressure P, a graph of PV against P is plotted.
APV
Flows
compressed
In
relationship at constant temperature?
Gases
easily
The speed of the observed motion would
increase if the temperature rose.
( )
29.
26.
the
C
motion of the air rnolecules.
D
states
gases?
will not be confused with convection
currents
30.
as
(
Two flasks are connected via a tap T as shown
in the diagram below. One of these two flasks
contains a gas, the other a vacuum. On opening
tap T which of these physical properties does
NOT
change?
DPV
A
Temperature
c
Pressure
B Density
D Mass
31. Which of the following best describes the motion
of gas molecules?
A Molecules vibrate about fixed position.
B Molecules move slowly in random direction.
C Molecules close together move at high speed.
D Molecules move randomly at high speed.
()
32. Which
II
ofthe following statement(s) is/are correct?
Pressure in gases is due to collision of
molecules with walls of the container.
Difirsion demonstrates random motion of
III
molecules.
Gases do not have a fixed shape as they
I
vibrate too fast about their equilibrium
positions.
IV
The random movement of smoke particles
indicates the presence of air molecules.
A I and III only
C I,II and IV only
B II and IV only
D All of the above
(
Melting, Boiling and Transfer of
Thermal Ene
t.
The diagram shows
a
device used to make potatoes
4.
bake more quickly in an oven. It consists of four
metal prongs. Each can have a potato pushed
onto it.
A cross-section of a solar panel is shown below. In
the labelling, three key words have been replaced
by the letters, R, S and T.
\l/
glass panel
temoerature
R material
S pipe
Which of these is a good explanation of the way
painted T
the device works?
A The metal prong conducts extra thermal
energy into the potato.
B The metal prong is a good electrical
C
D
2.
Which
B
C
D
D
3.
Thermal energy from the element of the
immersion heater is transferred to water by
A
B
C
D
conduction
convection
conduction and convection
conductior-r and radiation
Insulating
Nanrral
Lead
Black
Iron White
Copper Black
Zinc Silver (
)
that
reduces radiation?
A
B
C
D
is transferred down the rod bv
hot molecules moving along the rod
hot molecules changing places with cool ones
the air around the rod, which moves after
being heated
transfer of energy from one molecule to the
Straw
5. In a vacuum flask, which is the component
When one end of a rod is heated, thermal energ'y
A
B
C
RST
A Conducting
conductor.
The inside of the potato is compressed by the
Prong.
The potato is raised up by the prong, hence
( )
increasing its potential energ'y.
are the best words to replace these letters?
6.
The
The
The
The
silvered walls
stopper
vacuum between the walls
foam supporting the walls
In an oil refinery petrol storage tanks
with a light colour to reduce
A
B
C
D
energy
energy
energy
energy
gain by conduction
gain by convection
loss by conduction
loss by radiation
(
)
are painted
'7
a melting-point experiment, a thermometer is
placed in a test-tube of hot liquid.The temperature
In
10.
of the liquid is recorded every half minute. The
table below shows the results.
Time/min
Temp/"C
Time/min
Temp/"C
In
:ed
0
95
4.0
48
0.5
1.0
86
A<
42
67
5.0
36
l.)
))
5.5
2.0
55
55
6.0
30
zo
6.5
1/
z+
54
50
7.0
zz
/.)
27
2.5
3.0
3.5
What happens when a liquid is being heated at its
boiling point?
A There is an increase in molecular size.
B There is an increase in the temoerature of the
liquid.
c There is an increase in molecular spacing.
D There is an increase in the total number of
(
molecules.
11
)
Referring to the experiment below, what happens
to the wax in the boiling tube, and why?
What is the melting point of the substance?
B 27"C
A O"C
c 55"C
D 95'C
(
liquid wax
at 80 'C
Different surfaces reflect different proportions
of the Suns radiant energy. The chart shows
the percentage of heat energy reflected by some
surfaces.
Percentage of heat
energy reflected
100
A
Reason
Wax
Melts
Melts
B
C Freezes
D
T2
Freezes
Why does
Air supplies energy
Air absorbs energ'y
Air supplies energy
Air absorbs energy
a person coming
out of the sea to the
beach quickly feel cold?
red
white
washed brick
soil
tar
Which is the best way to treat a flat roof so as
reduce the amount of heat absorbed by the roo0
A To cover it with zlayer of red brick dust
B To cover it wit\ alayer of soil
C To paint it with whitewash
( )
D To paint it with tar
)
inted
9.
A
B
C
D
Water in a kettle boils and turns into steam.What
is happening to the water molecules?
A They are losing energy.
B They are beginning to vibrate.
C They are expanding and gettir-rg ligl-rter.
( )
D -fhey are mo\ring further apart.
13.
Convection occurs in the air.
Air is a bad conductor of heat.
Water evaporates from the skin.
Heat is lost by radiation from the skin.
()
Double glaz\ng improves the heat insulation of
houses because
A
glass ofdouble thickness does not conduct
heat
B
radiation will not pass through two sheets of
glass
C
D
the air trapped between the glasses is a bad
conductor ofheat
convection currents between the glass sheets
are
restricted
(
)
14. Which of the following
contracts the most when
cooled?
A
C
B Mercury
DAir
Iron
Alcohol
(
a water bath which is maintained at a
)
15. An electric heater
is immersed in water. What is
the main means in which heat is transferred from
the heater to the water?
A Conduction
C Radiation
B
D
16. Hot liquid in a vacuum
A
B
C
D
t7.
Convection
Wave
motion
(
20. The round-bottomed flask shown in the diagram
is at room temperature. It is then plunged into
steady
temperature of B0 "C.Which of the following bests
represents the variation of the value of / with time
t after the flask has been plunged into the bath?
)
flask loses heat by
conduction through the vacuum
convection through the vacuum
conduction with the cork
contact with the base on which
it
rs restrng
()
A
student investigates changes that may take
Which of the following
correctly describes these changesl
A A transfer ofenergy and a change in
place as sulfur solidifies.
B
C
D
18.
temperature
A transfer ofenergybut no change in
temperature
No transfer of energ'y and no change in
temperature
No transfer of energy and a change in
temperature
(
)
Which of the following methods would NOT
produce convection currents in a container filled
with water at 30 ocl
A Floating a piece of ice on the water
B Lighting a candle beneath the container
C Dropping a piece of hot metal into the water
D Placing a 100 W lighted bulb just above the
water surface
(
27. The graph below shows the variation of
temperature of a substance
substance is heated steadilv.
temperature
19. What happens when a solid is being heated at its
melting point?
A A decrease in the total number of molecules
B
An increase iq the
average
kinetic energy of
the molecules
C
D
A decrease in molecular size
An increase in molecular spacing
(
)
tr
tz
t3
From the graph, the process taking place
between t. and I is known as
A
C
cooling
melting
B
D
the
with time when the
boiling
solidification
(
11
.m
to
dy
25. A
Perspiring helps to cool the body because
A the temperature of the sweat is lower than
the body temperature
-.
B latent heat is absorbed from the body when
ne
solid substance is placed in a boiling tube and
heated steadily. The temperature-time graph
of the substance is as shown below. At which
labelled point would the substance be a mixture
of solid and liquid?
sweat evaporates
:hl
23.
C
heat is removed when sweat comes out of the
D
body
the body loses heat to produce sweat
temperature
A piece ofice is held at the bottom ofa test-tube
of water by means of a wire gluze as shown. The
w^ter at the top is heated until it boils. However,
the ice does not melt as
)\.
(0
\\
ilme
boiling water
()
glass tube
26. Which of the following
factors can increase the
rate ofevaporation ofa liquid?
A Increase the temperature of the liquid
B Increase the external Dressure
metal gauze to cover ice
rce
A
B
C
D
24.
C
D
hot water is less dense than cold water
water is a bad conductor of heat
glass is a bad conductor ofheat
the wire gauze absorbs all the heat from the
(
water
)
27.
Increase the humidity of the air outside
Decrease the surface area of the liouid
'()
The graph below shows the temperature change
that took place when a substance was cooled.
Which type of surface is the best absorber and
the best emitter of infra-red radiation?
Best absorber
temperature
Best emitter
A Black and dull Black and dull
B Black and shiny White and dull
C White and dull Black and shinv
D White and shiny White and shiny (
time
Which change of state does the portion AB of
the graph represent?
A
C
Solid to gas
Gas to liquid
28. - Expanded polystyrene
B
D
Liquid to solid
Liquid to gas (
is often use to
make
containers for storing ice cream because the
trapped air reduces heat transfer by
)
A
B
C
D
radiation only
corrduction only
conduction and convection
conduction. convection
(
29. When a little
cold. In
ether is spilt on the hand, it feels very
the case ofwatet it is almost unnoticeable
J).
because ether
has a greater specific latent heat
has a lower temperature
A
B
C
D
30.
evaporates much more quickly than water
( )
has a higher boiling point
Evaporation
Two liquids, alcohol and water, are spilt on a hand.
If both liquids are at same temPerature, why does
the alcohol make the hand feel cooler?
A It has a higher specific latent heat of
vaporisation than water.
B It is a better conductor of heat than water.
C It evaporates more readily than water.
D It has a lower boiling point than water.
ilj
:r:
.'.
:4.
a:.
()
is different from boiling in that
evaporation
A
does not require heat to change a
liquid to a
36.
gas
B
C
D
a1
J1
32.
takes place at high temperatures only
can take place only when the liquid is volatile
involves only the surface molecules
)
A electric kiln has a device in it to prevent the kiln
from getting too hot.The metals in the bimetallic
strips expand at different rates and bend when
heated. The contact points move aPart and electric
current stops flowing.
(
KEY
A
solar heater uses heat energy from the Sun to
heat water. The panels of the heater are painted
black.Why is this so?
A
B
C
To improve absorption of infra-red radiation
To improve the emission of infra-red radiation.
To improve the conducting properties of the
D
panel.
To reduce the convection
currents (
metal P
metal Q
n
metal R
I
)
-
metal S
contact
point
The following shows the rate at which thermal
energy is conducted through a substance.What is
the correct order ofconduction?
worst conductor
best
Solid
A Gas Liquid
Liquid
B
Solid
Gas
Gas
C Solid Liquid
D
Liquid
(
Solid
Gas
In order for this device to work.
)
A
33. Which of the following is NOT true
about the
nature of radiation of heat?
B
A It does not require a medium to propagate.
B The speed ofradiation depends on the
C
temperature.
D
C It consists of electromagnetic waves.
D Good radiators are also good absorbers.
37.
34. The blades on the ice
A
c
skates are sharp because
this increases the pressure on the ice and so
lowers its melting point
this increases the pressure on the ice and so
increases its melting point
the skates then grip the surface of the ice
with greater friction
r^^^l^''^'- '-"
nrrssillle
16
ir thcn
lirLlr
ru,r\\lLlt'lll
D ir
rl is
l,v'.''ur!
I
'1.
^":^l-lV
Qexpands more than R, and P expands more
than S
R expands more than S, and Qexpands more
than P
P expands more than Qrand R expands more
than S
P expands more than R, and S expands more
(
thanQ
)
The rate of heat transfer between an object and
the surroundings does NOT depend on the
A
c
colour
density
B
D
mass
surface area
rd.
38.
tes
In the diagram, two
X
and Y with
outer surface of different texture are filled with
same amount of water at room temperature and
copper cans
heated by heaters of same power.
A
c
heater
iln
llic
42.
XY
Ien
tric
Which of the following statements is correctl
A Water in X boils faster because dull surface
B
P
rl
Q
C
1l R
D
IS
j_:i
3and4
D 2 only
B
A given amount of ice is warmed steadily. Which
of the following is observed as its temperarure
rises up to 4 "C?
Mass Volume Density
A Increases Increases Same
B Same Increases Decreases
C Same Decreases Increases
D Decreases Decreases Same (
is
a good absorber.
rl
7 and2
4 only
Water in X boils faster because dull black
surface is a better insulator.
Water in Y boils faster because polished
chrome surface is a poor radiator.
Water in both cans take equal length of time
to boil because texture of outer surface will
not affect the rate ofenergy absorbed by the
)
+J
I
I
I
I
I
water.
i
39.
Which diagram
shows
thermal expansion?
"t.t
a useful application of
'.
A
slack telephone wires
nore
flexible joint in
steam pipes
:nore
bimetallic
thermostat
more
gaps in concrete
bridges
more
t)
t and
r
the
In the experiment
above, a length of fine copper
wire whose ends are attached to two weights is
passed over a block of ice.Which of the following
()
40. A match would ignite if held 10 cm above a
Bunsen flame but not if held 10 cm away to one
side of the flame. This is because mosi of the
energ"y is transferred by
A
C
()
4t.
conduction
diffirsion
B convection
D radiation (
statements is correct?
The wire stays on top of the block until all
the ice has melted.
A
B
.
The wire cuts into the ice and gets stuck
somewhere towards the center of the block of
C
ice, and stays stuck until all the ice has melted.
The wire cuts through the block of ice,
leaving the block in one piece after cutting
D
The wire cuts through the block of ice,leaving
)
through it.
the block in two pieces.
()
44.
The formation of rain in clouds causes
the temperature of the air to rise
the temperature of the air to drop
A
B
C
D
the pressure of the air to rise
the pressure of the air to drop
49.
(
B
C
D
)
50.
floor feels colder than the carper. What is the
likely explanation?
Air is unable to circulate through the carpet
A
fibres.
C
D
46.
A
B
C
piece of ordinary kitchen aluminium foil
is used to wrap around food to be cooked in a
barbeque fire. The foil has a shiny side and a dull
side. Which side should be outside, and why?
A The dull side should be outside because it
a
it
51.
is
The dull side should be outside because it
D
encourages convection currents to be set up.
The shiny side should be outside because it is
better absorber ofheat radiation.
47. When pure water
A
D
better conductor.
C
a
freezes
occur due ro
Pressure
ofa
gas
Tiansfer of heat by radiation
Thermal conduction
(
Which of the following is the best
A
as
the glass fibre will not absorb much heat
and this low thermal capacity results in good
insulation
the thermal conductivity of glass is very low
and therefore yery little heat is transmitted
the fibreglass prevents the faster-moving air
molecules from escaping into the roof from
the room below
the fibreglass reduces air movement within
the fibreglass matting and stationary air is a
very good insulator
insulatorl
A Still air
C Fibre glass
52.
)
Householders are being urged to reduce heat loss
from roofs by laying a matting of fibreglass, which
consists of a very large number of intertwined
fine glass fibres, on fhe floor of the roof space.
A
B
NOT
The principal reason why fibreglass is effective
a heat insulator is that
More heat flows from the carpet to your foot
than from the stone floor to your foot.
More heat flows from your foot to the stone
floor than from your foot to the carpet.
The stone floor is at a lower temDerature
than the carpet.
( )
absorbs radiation faster.
The dull side should be outside because
does
the movement of molecules?
A Convection of heat
45. When you stand barefooted with one foot on a
stone floor and the other on a carpet, the stone
B
Which of the following
thermometer
thermal
B Cork
D Plastic
(
)
at a place records a rise in
temperature from the radiation produced. What
is this radiation?
to ice, its particles
A Ultraviolet
C Gamma ray
move closer together and stop moving
B
D
Infra-red
Alpha particle
()
completely
B move closer together and move at lower
53.
speed
C
move further apaft and vibrate about fixed
positions
D
move further apart and continually change
with nearby particles
(
places
)
48. Which of the following is unchanged during the
melting of a block of ice?
A
B
C
D
Force between molecules
Distance between molecules
Density
Kinetic energy
Heat transfer from a hot flame to water in
saucepan takes place by
A
B
C
D
conduction and convection
conduction and radiation
convection and radiation
conduction, convection and radiation
()
a
to
54.
a section through
type of building board.
The figure represents
a
particular
58.
Air is blown through a tube containing
some
ether. Underneath the tube is a small pool
water as shown in the diagram below. Which
comPressed
of
of
these best describes what happens?
paper.
boards
)
..-aluminium fo'l
.OSS
expanded
polystyrene
---arr
,ich
aluminium foil
ned
ace.
Which one of the following explains why such
eas
boards provide good heat insulation?
Aluminium
foil is
rod
A
B
C
D
)w
.l
u
air
Expanded
polystyrene is
a good reflector a poor conductor
a poor reflector a poor conductor
a good conductor a good reflector
a good conductor a poor reflector (
Ether
Water
A Boils
Evaoorates
B Evaporates Freeres
C Condenses Evaporates
D Freezes
Boils
rm
tn
SA
rr
t :?,
.=
rmal
)
;e in
Vhat
Cooking an egg on top of a mountain takes a
longer time than at sea-level because the pressure
on the mountain
A is lower than that at sea-level. so that the
boiling point of water is lowered
B is lower than that at sea-level, so that the
boiling point of water is raised
C is greater than that at sea-level, so that the
boiling point of water is lowered
D is greater than that at sea-level, so that the
boiling point of water is raised
( )
tubes blackened?
r)
ina
Dark
Dark
Dark
Dark
surfaces absorb radiation well.
surfaces conduct heat well.
surfaces emit radiation well.
surftces reflect radiation
well. (
|./
Gaps are usually left in between the cement slabs
on the pavement so as to
A allow for the effects of expansion and
contraction
B allow the rain water to drain away
C enable uniform heating of the cement slabs
by the sun
D enable efficient cooling to take place during
the day
( )
60.
Long pipes carrying hot liquids often have bends
in them. The bends are needed to
A allow for increase in pressure
B allow for expansion
C make the pipes stronger
( )
D allowfor contraction
6I.
A pond is frozen in winter.Which of the following
gives the most likely temperatures at P above the
)
5/. Shiny aluminium foil is used to wrap around food.
This reduces thermal energy loss by
A conduction
B convection
C conduction and convection
D radiation
)
59.
)b. The tubes inside solar heating panels allow the
Sunt radiation to warm water. Why are these
A
B
C
D
(
ice, at
(
)
Qjust below the ice, and at R at the bottom
ofthe pond?
PA-R
A O"C O"C
B O"C 4"C
OOC
0c O"C
4"c
D-5"C -5"C 00c
c -5.c
0
(
)
62.
The diagram below shows a beaker of water
heated by an electrical heater.
64.
Two copper cans are filled with boiling water
as shown. One can is insulated with wool. The
temperature of the water in each can is taken
everv minute.
thermometer
Which of the following diagrams best illustrates
the convection currents outside the container?
can
1
can2
Which graph shows the results obtained?
room
remp.
63. A bimetallic stripr which
consists of metal X
Y,
is
observed
to respond to
to
metal
strip
riveted
different temperatures as sholvn.
room
temperature
time
I
It
can be concluded that
A
B
C
D
X expands more thanY
Y contracts less thanX
Y has a higher expansivity
X is a better conductor than Y
ter
he
:en
Unit
11
Waves
The difference between a transverse wave and
Which of the following corectly shows the
longitudinal wave is the
A wavelength of the wave
resultant direction of the waves?
B
C
D
A
medium through which the wave travels
speed of the wave
direction of vibration relative to the wave
(
rrrotion
)
2. Two corks, X and Y, are floating on the water.
Which of the following best describes what
D
happens to them as the wave passes?
motion
4.
A
B
C
D
J.
X moves up and Y moves down.
X moves down andY moves up.
X and Y moves forward.
X and Y move up and then forward.
Which of these waves can only be
A
B
C
D
(
5.
)
transverse?
Waves on a stretched string
Radio waves
Sound waves in air
Waves produced by a speaker
(
Water moves from deep water to shallowwater
shown below.
The figure below shows parallel water waves
entering deep water from a shallow water region.
shallow
water
deep
water
oeep water
Which of the following statement is true?
-A
B
C
D
The speed of the waves is the same.
The wavelength in shallow water is shorter.
The frequency in shallow water is smaller.
The waves change direction because of
reflectiori.
(
)
as
The figure below shows an instantaneous position
of a string as a transverse progressivewave travels
along it from left to right.
D
Which two particles have theirvibration in phase?
A tand4
B 3and6
C 2 and7
D 5and7 ( )
7.
The graphs below show how the displacement of
air molecules change with time when different
sound waves are passing by. The scales for each
9.
graph are the same. Which graph shows the
sound with the highest frequency?
The diagram below shows the position of a string
at a particular instant of time as a transverse wave
travels along it from left to right.
AB
c
o
E
c)
o
o
0
Which one of the following correctly shows the
direction of the velocities of the points 7,2,and
3 on the string?
I
A
8.
2
3
+
+
J
+
B
C
,l
D
I
J
I
J
()
The diagram shows the curved waves about to
a plane barrier.
hit
10.
P and Q-^t. two points t2 m apat on a stri
Point P vibrates 4 times a second and the
reaches Qt*o seconds later. trind the period
wavelength of the wave.
Period/s
Wavelength./m
A
B
C
D
Which of the following diagrams A to D shows
the paths of these waves after they have hit the
barrier?
0.25
0.25
1.5
2
1.5
J
2
a
J
Lt. The diagram below shows the displacement of
particles along the path of z wzve Which two
14,
A
transverse wave travels steadily from
right as shown.
particles are moving in the same direction at that
instant?
dir""tion of
direction of wave travel
prop"g.qr"
)
rt
left to
Which of the following shows the directions of
movement of the particles X and Y?
XY
of
A
rent
:ach
the
A B andD
C CandE
B BandF
D DandF
(
To the right
Downwards
D
Downwards (
Upwards
Upwards
)
)
15
T2
To the right
B Downwards
C Downwards
A
pulse (shown in the diagram below) is sent
A vibrator dipping into water in a ripple tank
along a thin cable which is attached to a wall at
has a period of 1/6 s. The resulting wave has a
wavelength of 0.02 m. What is the speed of the
one end.
wave?
A
C
13.
0.02 m s-l
3ms-1
B
D
0.12 m
s-1
6ms-1
The following diagram illustrates crest of circular
wavefronts radiating from a point source O.If the
time taken for a wavefront to travel from P to Q
is 10 s, and the wavelength of the waves is 2 m,
the speed of the waves, in m s-1, is
Which of the following diagrams correctly
shows the subsequent reflected pulse?
16.
A
c
0.20
1.00
B
0.80
D
7.25
The diagram shows a wave.
Which of the following
A
Frequency
q-^^r
decrease s as r.ime passes)
B
velengtl-r
17.
A 12-slit
disc is used as a stroboscope.
It
makes
20 revolutions every 6 seconds. When used to
view waves in a ripple tank, the waves
^ppear
stationary. What is the frequency of the waves?
A 20Hz
C 100 Hz
B 40Hz
D I44Hz
(
18. Which of the following statement(s) is/are
20. The diagrambelowshows thewaves in aripple tank
in which the water in parts P and Qis of different
depth.Wnich conclusion can be made about the
speed and the wavelength of the waves in P and Q!
v1
)
true
about a transverse wave?
It carries energy.
It has comoressions and rarefactions.
I
II
III
IV
Its speed dlpends on the medium.
The vibration of its particles is parallel to the
direction in which the wave travels.
Ripple is a form of transverse wave.
V
A I,II and III
C II,IIIandIV
B I,III and V
D II,IIIandV (
)
A
79. The graph below
shows how a particle on the
surface of a liquid is displaced by the passage of
Vrrs greater than Vr.'Ihewavelength is greater
in Q-
waves.
C
displacemenUcm
D
2I.
(
is greater than
in
P.
(
is less than Vr.'Ihe wavelength is greater
q
speed of these waves is 2 cm s-1,which
the following is correct?
A
B
c
D
Wavelength/cm Amplitude/cm
0.006
0.04
0.0L2
0.006
0.012
0.006
0.04
0.04
in
'{
.-:
( is less than Vr.The wavelength
inP.
is greater
(
)
The figure below shows two pulses moving along
a rope towards
If the
Vr.lhewavelength is greater
point X.
of
Both pulses arrive at X simultaneously. Which
of the diagrams below shows the resulting
waveform at X?
(
22.
The graph represents aw^vepulse travelling along
t
a rope
e
arrow.
^t
2m
s-1
WavelengtVmm
Frequency/Hz
15
aA
A
in the direction shown by the
)
B
15
40
C
22.5
22.5
2.6
D
25
From the moment shown.what is the shortest time
before the point P on the rope has a displacement
of 1.0 m?
A
C
2.0s
6.0s
B
D
4.0s
8.0s
A
wave generator which makes 5 oscillations a
second is used to produce waves in a ripple tank.
cm
Which of the followinq is correct for the waves
produced?
Frequency/
rter
Hz
aa
ZJ
z-tel
)f
Which of the following statements
about
three waves listed below is correct?
Water
waves
1n
Sound
waves
26(
Electromagnetic
A 0.5
B5
C5
D20
Wavelength/
ctn
126
J15
72
360
waves
er
A Tiansverse Longitudinal
Stationary Stationary
Tiansverse
B Longitudinal
-Progressive
Stationary
C
24.
Tiansverse Longitudinal
Progressive Progressive
Speed/
cm s-l
240
t)
Transverse
Stationary
Longitudinal
Stationary
Tianwerse
26. The two
graphs below refer to the same wave.
What is the speed of the wavel
Progressive
D Longitudinal
Tiansverse
Longitudinal
Stationary
Progressive
Progressive
'souice
S produces circular
vibrating'
reflector.
straight
t
a
waves ne
A
1.0 1.2 1.4 1.6
1.8 2.O 2.2 2.4 2.6
A
9.3 m s-l
C 0.72 m s-r
B
D
2.25 m s-l
0.35 m s-t
27.
A
student generates a transverse wave in a long
rope. He makes 2 oscillations in 1.6 seconds.
29. The diagram shows a water wave. Four quantities
associated with waves have been labelled.
B amplitude
C wavelength
Which quantify is labelled wrongly?
Which of the following correctly represents the
shape ofthe rope one second later?
A
30.
Tiansverse waves are moving past a small boat on
a lake.
wave travelling
this way
Which waywill the waves make the boat move?
A Towards the left
B Towards the right
C
D
Baclsrards and forwards
Upwards and downwards
(
)
31. When waves approach the shoreline with a gentle
28. A ripple tank contains water of varying depths.
Which diagram correcdy represents the water
waves as they travel from the shallow to the deep
region?
A
+-B
<-
slope,
A
decreases
B
C
D
<--D
their wavelength increases but the.frequency
theirwavelength decreases but the frequency
remains constant
their speed increases but their frequency
remains constant
their speed and frequencyboth increase
32.
A
pebble is dropped into still water so that
circular wavefronts are seen to travel outwards
with a speed z. If the wavelength is )'., what is the
time taken for the disturbance at P to reach Q
B
c
lon
33
A+
B
A
r-
D2X
3)"
2,
1
35. The diagram represents the displacements of a
particle caused by a progressive wave travelling at
a speed of 5.0 m s-1.
1)
Which of the following graphs best
represents
how the wavelength, 1,, of the water waves in the
ripple tank, varies with its frequency,;f?
displacemenVmm
BI
Al,
\
/\
10
20
N
30
time/ms
-2
What is the frequency of vibration of the
particle?
0.25
A
Hz
C 700H2
Sende
50Hz
D 250H2
B
rency
36. If a wave of velocity c is of frequenry F' and
uency
()
34.
The diagram shows the direction of travel of
plane water waves from a deep region to a shallow
region.
Deep
Which of the following shows the direction of the
waves after passing into the shallow region?
wavelength ,\, then for a wave of velocity 2c, the
frequency and wavelength could be
Frequency
A2F
B
c
DF
F/2
F/2
Wavelength
2i
I
2
2i
()
small boat floats up and down on waves on the
sea as shown in the diagram below.It takes 4.0 s
39. A
37.
to make one complete up and down movement'
wave travelling
this way
A vibrator generates
a travelling wave on a string.
The diagram shows the shape of the string at a
certain instant. Which of the following shows
the shape of the string between P and Qafter a
quarter of a period?
AB
What is the frequency, in Hz,of the
A 0.25
c 4.00
B 0.50
D 8.00
waves?
(
{i
40. Which of the following
diagrams shows sound
waves travelling from air to glass?
A
ar
C
D
38. The basic difference between transverse and
longitudinal mechanical waves is a difference in
A
direction ofvibration
B frequency
c medium through which they travel
D wavelength
al
,*E
ii
,j:':
1e
Unit 12
)s
Electromagnetic Spectrum
electromagnetic radiation used to make
satellite photographs of the weather in the
daytime and at night is
B microwaves
A infra-red
D ultraviolet
C visible light
7. An
7. Given the approximate wavelength of ultraviolet
ray is 1 x 10-7 m, what is the approximate
wavelength of X-rays?
A
C
5x10-2m
5x10-7m
B
D
5x10-sm
5x10-10m
)
und
2. Which of the following electromagnetic waves
is usually employed in industrial heating and
8. P and Qare
different wave motions. P travels
much faster than Q but has a much shorter
wavelength. P and Qcould be
drying?
A Microwaves B Infra-red rays
(
C Visible light
D X-rays
A
B
C
D
)
3. Which
of the following waves is the most suitable
for destroying cancer cells?
A X-rays
B Gamma-rays
C Ultrasonic
D
Ultraviolet rays
9.
()
P
Ultraviolet
Radio
Red light
Radio
Radio
Infra-red
Sound
Red light
The diagram shows the relationship between
the energy of electromagnetic radiation and the
wavelength of the waves.
4.
The following pieces of instruments are used on a
ship.Which of the following produces waves that
are not electromagnetic?
A Navigation lights B Radar
C Radio Transmitter D Fog horn
energy
()
5.
The speed of radio waves is 3.0 x 108 m s-1.
A VHF radio station broadcasts at a frequency
of 100 MHz. What is the wavelength of the
waves broadcast by the station?
A
C
6.
0.33 m
3.0 x 106m
B
D
3.00 m
3.0 x 1010 m
wavelength
()
Which of the following has the lowest energy?
B Microwaves
A Infra-red
( )
D X-rays
C Ultraviolet
A VHF radio station broadcasts at a frequency 60
MHz.The speed of radio waves is 3.0 x 108 m s-1.
What is the wavelerigth of the waves broadcast by
the station?
A
C
0.2m
2.0m
B 0.5m
D 5.0m
10.
(
)
How do the wavelength, frequency and speed of
ultraviolet light in vacuum compare with those of
visible light?
A
B
C
D
Wavelength Frequency
Longer
Longer
Same
Shorter
Higher
Lower
Lower
Hisher
Speed
Slower
Same
Slower
Sarne
=
type of wave Passes through fog and low
cloud with the least difficultY?
A Monochrome blue light
B Radio
17.
11. Which
C
D
72. Which of the statements below is true of electro-
18.
magnetic waves?
C
Radio waves are longitudinal waves'
The wavelength of infra-red radiation is
longer than ultraviolet radiation'
A11 electromagnetic waves travel at the same
D
soeed in water.
Ultruro,..td has a higher frequency than,
radio
waves.
A
B
C
D
Unchanged Increased
Unchanged Decreased
Decreased
Increased
Unchanged
Unchanged
)
I x I visiute I
ultraviolet rays from the Sun have become
trapped inside the car
C th. b,r" has warmed up the metal surface of
the car
D ultraviolet rays from the Sun have been
absorbed by the glass in the windows of the
()
20.
YIZ
of
the
XYZ
A
B
C
D
15.
correct relationship between the frequency f of an
electromagnetic wave and its wavelength, l"?
A1
BI
X,Y andZ?
rays Infra-red X:raYs
Infra-red Gamma-raY X-raYs
Infra-red X-raYs Gamma raYs
Gamma-ray
X-rays
Infra-red
(
fro- l.ft
to righq the ProPertY which
increasing is
B frequency
D wavelength
amplitude
velocity
L6. Which of the following
A
B
C
Which one of the following graphs shows the
Gamma
Reading
A
C
++
()
cat
electromagnetic spectrum, in order of decreasing
wavelengths from left to right.
Which p"ttt of th. sPectrum are
a sunny day,
wlnclows
Decreased
Increased
Decreased
Increased
14. The chart shows the various Parts
electromagnetic
A camera
A microphone
A
Wavelength
Ultraviolet
use
waves in its operation?
B A radio set
D A television set
()
reason for this is
infra-red rays from the Sun are high-energy
rays and can easily pass through the glass
Refer to the chart to answer questions 14 and 15'
Radio
Which of the following does not make
d
a man parks his car with all its
windows .iot.i. When he returns he is surprised
at how unpleasantly hot it is inside' The main
and wavelength?
FrequencY
)
of
A
C
13. When green light travels from water to air, what
are the changes, if any' to its velociry frequency
Velocity
(
ofconcrete.
t9. On
(
is
incorrect?
Visible light rays can travel through a vacuum'
Infra-red rays are emitted by hot objects'
Ultra-violet rays can produce sunburn'
Radio waves can travel through thick sheets
A
B
C
D
Ultraviolet
Infra-red
A
B
Which of the following statements aboutwaves
(
I
are longitudinal waves?
Infra-red radiation transmitted through water
UltrasotLnd trar-rsmitted through air
Gantrna ravs emitted from radioitctive sor-rrces
used
in microwave ovens
(
)
Anit 13
IS
a.
t.
-)
An exploding star gives out energy in the form of
waves. The waves travel to Earth through space.
Which of these could NOT be received from the
Which is the effect of increasing the speed of the
wheel?
A
B
C
D
star?
A
B
C
D
)
its
Radio waves
Sound waves
z.
A
C
\v
a
J.
of
een
)
16.5 m
B
D 66.0m
(
echo-sounder on a ship produced a pulse
of sound, the echo of which was received by an
echo-sounder after 2 seconds.
)
When a band is heard at a distance, the music
from the flute and the tuba do not go out ofstep
with each other. This is because
A the wavelength of the two notes remains the
B
C
-t
-t-
D
the eardrumvibrates in sequence to these
two notes
the notes ofdifferent frequencies travel at
the same speed
the pitch of the two notes is the same (
A
)
What is the depth of the sea? The speed of
sound in water is 1500 m s-1.
1500 m
A 750m
D 4000m
C 1600m
). A sound is produced by a holding a card against
the toothed wheel that is rotating.
+
T
(
as a
7. An
same
>L
Which musical note could be best described
loud, low-pitched sound?
Frequency
Amplitude
High
A
Small
Low
B
Small
High
Large
C
Low()
D
Large
-.
4.
,f an
B Overtones
D Frequency (
A bat emits an ultrasonic sound wave at 33 kIIz
and receives an echo 100 ms later.If the speed of
sound in air is 330 m s-l the distance of the bat
from the object producing the echo is
33.0 m
A 10.0 m
C
the
)
Amplitude
Wavelength
()
)
Which of the following determines the quality of
a note?
the
(
6.
;ed
in
Infra-red waves
Light waves
A decrease in the pitch ofthe sound
An increase in the pitch of the sound
A decrease in the speed of the sound wave
An increase in the soeed of the sound wave
B
8.
Which of the following frequencies of
sound
cannot be detected by the human ear?
5000 Hz
A 50Hz
C 500 Hz
B
D 50000H2 (
)
i
-1-Q
g.
'i c,
By making measurements on the diagram, find the
wavelength and amplitude of the wave'
A car, which is travelling normally towards a cliff
at a speed of 50 m s-1, sounds its horn when it
is 0.7 km away. Taking the speed of sound to be
300 m s-1 in air, find the time taken for the driver
to hear its echo.
A 0.0040 s
c 4.7s
10.
B 4.0s
D 28.0s
Wavelength
A
B
lp
)
The sonar of a ship sends an ultrasonic pulse
towards the seabed and the reflected pulse
is received 1.5 s later. If the depth of the sea is
7.25 km,what is the speed of the ultrasonic wave
in seawater?
B 1562.5 m s-1
A 787.25 m s-l
D 3125ms-1 ( )
s-1
C 1280 m
11. An electronic synthesizer produces two
13.
AmPlitude
0.8 cm
6.0 cm
6.0 cm
12.0 cm
12.0 cm
qC
(
,-
1.1 cm
-0,! cm
1.1
cm
)
Which frequency is approximately in the middle
of the human hearing range?
A
C
14.
15.
displacement
B 5000 Hz
D 100kHz (
2000 Hz
10 000 Hz
)
distance between two successive
rarefactions in sound waves of velocity 330 m s-i
ahd frequency 600 Hz?
1.10 m
0.55 m
What is the
A
C
Pure
notes A and B as shown. Which of the following
statement about A and B is wrong?
B
D 2.36m
1.18 m
(
)
Which of the'following statement(s) is/are
about sound waves?
I
II
III
IV
They are produced byvibrating objects'
They can travel through a vacuum'
They are longitudinal waves.
The speed ofsound is greatest in gas and least
in a solid.
A I andll
B I and III
C I andlV
D IIIandIV
(
)
t6. A man beats the drum with a greater force
before.Which of the following correctly describes
A A
is louder than B.
B Pitch of A is higher than B.
c Frequency of B is higher than A.
D A and B have the same speed.
(
the changes, ifanY?
(
)
12.
Before the wav.e arrived, the particles were all
1.0 cm apart. At the instant shown, the particles,
R Qand R are Passirlg through their original
undisturbed positions.'
A
B
C
D
The speed
The speed
ofthe sound increases.
ofthe sound decreases'
The amplitude of the sound increases'
The amplitude of the sound decreases.
1/
he
A
signal generator is connected to a loudspeaker.
This gives a musical note that a person can hear.
The signal generator has two controls: one for
amplitude of sound and one for frequency. How
should these be adjusted to give a quieter sound
of higher pitch?
27. A bat emits sound waves of
frequency 30 kHz
and receives a reflected signal from an obstacle
0.15 s later.The speed of sound in air is 340 m s-1.
How far is the obstacle away from the bat?
A 1L.3 m
25.5 m
C 51.0 m
)
B
D 88.2m
22. Which of the following
(
statements about sound
is correct?
Loudness of a sound increases with timbre
ofthe sound.
B Pitch of a sound increases with the
frequency ofthe sound.
C As the wavelength of the sound increases,
pitch ofthe sound increases.
D Sound cannot travel through water. (
tdle
A
)
islve
ns'-t
Frequency
Increase
Increase
Decrease
Decrease
Increase
Decrease
Increase
Decrease
B
C
\
true
Amplitude
A
D
23. When
Sound waves and lieht waves are similar
in that
B
oscillate up and down
oscillate parallel to the direction of the wave
both
C remain stationary
A
B
C
D
D oscillate perpendicular to the direction of the
are produced by mechanical vibrations
()
are longitudinal waves
can travel through vacuum
obey the laws of
reflection
)
(
t9. Which of the statements correctly describes
the similarity between water waves and sound
A
B
C
D
Both
Both
Both
Both
z+.
A loudspeaker consists of a cone that vibrates to
and fro.If the cone is made to vibrate with a larger
amplitude, the sound will become
A higher pitched B lower pitthed
C
waves?
20.
of
afi
A
18.
a sound passes through air, the particles
)
travel at the same speed.
can propagate in space.
can be reflected.
travel fastest in solids.
A man who is standing at point X
(
)
louder
D quieter
(
)
25. Sonar waves are emitted from a surface vessel
to determine the depth of the sea. The emitted
signal and its reflection from the sea are displayed
on the oscilloscope as shown below.
benareen two
parallel walls fires a pistol.
x
He hears echoes alter 0.5 s and 0.8 s. A further echo
is herrd :rfter firinq. at a time of ---1.3s
1.1 s
.
A
C
2.2s
B
D 2.6s
(
)
The horizontal speed of the oscilloscope trace is
6 cm s-1.The speed of sound in water is 1200 m s-1.
What is the depth of the sea?
A 200m
C 600m
B 300m
D 2400m
(
)
26.
Which of the following correctly gives the speed
of sound in air, wate! and iron?
Iron
Water
Air
m s-1
1500
m
s-1
5000
A JJU In S'
5000 m s-1
1500 m s-1
B 330 m s-1
5000ms1
330 m s-l
C 1500 m s-l
330 m s-1
m
s-1
1500
D 5000 m s-1
JU.
The diagram shows an enclosed hall whose walls
are assumed to be perfect reflectors
sound
waves.
()
27.
of
60m
x0
The diagram below shows alarge diameter copper
PiPe.
B
100 m
copper prpe
\J
A boy stands at the position X. If he hears the
first two echoes at 20 ms and 60 ms, how far is
he away from walls AB and AD respectively?
In an experiment, a student at E bangs the pipe and
his assistant at O hears two sounds, one arriving
before the other. The most likely explanation for
A
B
C
D
31
man sees an explosion in a nearby quarry. Two
seconds later, he hears the sound. Another two
28. A
cliffbehind
air
travels
through
that
sound
the quarry. Given
at 330 m s-1, how far is the man from the cliff
seconds later, he hears an echo from a
A
C
990m
495m
B 660m
D330m
29. Which of the following
musical note?
A Amplitude
C Waveform
(
affects the quality
B Frequency
D Wavelensth (
)
of
:
1]
fAssume the speed of sound in air to be 340 m s
this is
A the speed ofsound through copper is greater
than that through air
B the speed of sound through copper is smaller
than that through air
C the speed ofthe reflected sound is greater than
that of the incident sound
D the speed of the reflected sound is smaller
( )
than that of the incident sound
behind the quarry?
'
a
)
32.
Distance fromAB
6.Bm
3.4 m
13.6 m
20.4 m
Distance fromAD
20.4 m
1.0.2 m
40.8 m
6.Bm
.
.
()
ii;
+t
'=
a:
1.
LJ
33. When sound waves are travelling in still uniform
air, which one of the following quantities will
tu
, ,.1
Frequency
Speed
B
D
Amplitude
()
The best description of the motion of air particles
due to a sound wave which is travelling through
alr ls
random motion
periodic motion
constantdeceleration
constant velocity
A
B
C
D
continuous sound wave of freauency 200 Hz rn
att.
OP
37.
S
s-t]
D
1800/2.8 m
D (1800 x 2.8)/2 m
Wavelength
34. The diagram below shows a loudspeaker producing
a
1800 x 2.8 m
B
c 1800x2.8x2m
change?
A
C
A
loudspeaker
Which diagram best shows how sound causes
molecule at P to move during 1/200 s?
Paul stands in front of alarge wall. He claps two
pieces of wood together regularly at 0.8-second
intervals. The echo of the first clao coincides with
the third clao.
a
If the speedtf
sound in air is 325 m s-1, find the
approximate distance between Paul and the wall.
A
C
A
1-30
m
390m
B 260m
D406m
(
)
man P stands 500 m from a vertical wall.
A
second man Qis located 200 m from P and
700 m from the wall. as shown below.
C
o
I
35. A geologist
rgates
and
:gions
Ls
If
the
can investigate the position ofpossible
oil-bearing rock by seismic surveys. This involves
making a small explosion on the surface and then
timing the return of the reflected pulse from the
oil-bearing rock.
haded
ound?'
timing
device
When P fires a gun, Qhears two bangs. What
is the time interval between the two bangs if the
velocity of sound in air is 340 m s-1?
A 0.59 s
B 1.5s
( )
C 3.5s
D 2.9s
39. The diagram shows the position of air particles
at a particular moment when a sound wave is
passing.
a o o aoo o a o aaa o o
12345
a
The wavelength is the distance between
A
C
In such
a survey, a geologist found that the time
interval was 2.8 s benvee n the erplosion and the
arrival of the reflected pulse. Assuming the speed
ofsound in earth is 1800 m s-r. how far below
7 and2
7 and4
B 1and3
D 1and5
(
)
Given the speed of sound in air to be 340 m s-1,
what is the time interval between the two firing
sounds received by B?
B 0.41 s
A 0.12 s
40. Two persons P and Qstood in front of a vertical
cliff. P fired a pistol. The time for the sound to
travel directly from P to Qis /, seconds and the
time for the echo to reach Qis /, seconds, both
times measured from the instant the pistol was
fired.
If the speed of sound is 340 m s-1, what
the value of
tr-
D 1.00s
C 0.50s
(
is
43. During a thunderstorm, an observer sees z
lightning flash. 6 seconds later he hears the
thunder. The speed of sound is 330 m s-1.
tr?
Approximately how far away is the observer from
the lightning?
A
C
44.
B 1.30 km
D 1.98km (
1.20 km
0.50 km
)
Hz travels from
is
the
wavelength?
What
a violin to
(Take the speed of sound in air to be 340 m s-1)
A
sound wave of frequency 256
a boy's ear.
A 0.5s
C 2.0s
B 1.0s
D 2.5s
(
)
4r. The diagrams represent sound waves displayed
on an oscilloscope. Assuming the controls of the
oscilloscope remain the same for each sound,
which diagram represents the quietest sound with
340
A Zg^
B
256x340m
C ffi^
D
2s6x:asm
25611
(
I
45. The frequency of a high note is greater than that
of a low note. It follows that the hiqher note
has
the highest frequency?
A a shorter wavelength
B a longer wavelength
C a slower speed in air
D agreuter speed in air
B
46. The velociw of
D
A
B
C
D
()
42.
Two persons (A and B) stand 170 m away from
a wall as shown below.The separation between A
and B is 340 m. Person A fires a gun at a certain
moment. Both persons heard the firing twice.
wall
sound
in air deoends on the
pressure of air
pitch of the note emitted
temperature of the air
distance from the source to the receiver
()
47. The echo sounder of a ship indicates the depth
of the water below the keel to be 480 m. If the
time interval for the sounding is estimated to
be t/5 s, the speed of sound in water would be
approximately
B 2400ms-l
A 1200 m s-1
D 4800ms-1 ( )
C 3600ms-1
The waveforms of two notes X and Y are shown
on a cathode ray oscilloscope trace with the same
scale.
B
C
D
L
:he
s-1.
om
:om
+h?
-1)
49. A person speaking down a long tube can be heard
more clearly by another person with his ear to the
tube because sound waves
A are reflected offthe walls of the tube
Which of these statements is true?
A X has a higher pitch than Y but is not as loud.
B X has a higher pitch than Y and is louder.
C X has a lower pitch than Y and is not as loud.
D X has a lower pitch than Y and is louder.
are amplified offthe walls of the tube
are refracted inside the tube
travel faster when
enclosed
(
)
Unit 14
Reflection and Refraction
1. A
beam of light from a torch-is aimed at an
arrangement of four flat mirrors. Which diagram
shows the path that the light beam follows?
3. A
ray of light is incident on a piece of glass
block as shown in the figure below. Which of the
following expressions should be used to calculate
the index of the glass block?
AB
A
sin 40"
sin 30'
C sin
S1N
4.
2.
A
ray of red light falls on a glass prism as shown
in the diagram below (The refractive index of the
glass is 1.5.)
Which of the following shows the path of the
light through and out of the prism?
A
30"
JU
B
D
sln )u
sin 30"
SlN JU
sin 40"
Light can travel from one end ofan optical fibre
to the other, even if the fibre shows a curved path.
This is due to
A
B
C
D
refraction of light
the use of plane mirror
total internal reflection
A
ray of light strikes a plane mirror
dispersion of light
M,
at
glancing angle of 40o. The mirror is now rota
anti-clockrarise through an angle of 10o to a
position M, without changing the direction
the incident light ray.
Because of a change in the position of the plane
mirror, the reflected light ray would turn
an angle
A
B
C
of
10o clockwise
20" clockwise
10o anticloclcwise
The diagram below shows a ruy of l\ght travelling
across a water - air boundary.
10.
The diagram shows the image of the face of
clock seen in a plane rnirror.
a
;r;
(l
What is the correct time?
A
c
What are the correct names of rays X and Y and
angleZ?
XY
A Incident
B Emergent
C Refracted ..
D Incident
AngleZ
Refracted
Incidence
Incident
Incident
Critical
Incidence
Critical
'J
Refracted
11.
3.35
7.20
B 5.40
DB.2s
(
)
The diagram shows a ray of light moving from
diamond to air.
()
)
The image for.med by a plane mirror is always
I
II
III
upright.
virtual.
as big as the object.
Which of the above is true?
B
A I only
C II and III only
III
only
D I,II
and
III
only
()
Determine the critical angletf diamond.
B'27"
27"
Arr object O is placed in front of a plane mirror
MN as shown in the diagram below. A student
moves her eye along the line XY to observe the
image of O.Identifi the point (s) on the line XY
where the image of O c'hnnot be seen.
A
c
12.
63"
D65
oo
A 7,2
and 4 only
3 and 4 only
B 1,3 and 4onIy
(
D 4only
)
A man of height 1.8 m stands 0.5 m in front of
a vertical plane mirror. What is the minimum
length of mirror which will permit the man to see
t
tlls whole bodyi
A 0.5m
C 1.5m
B 0.9m
D 1.Bm
(
)
)
The diagram. below shows a ny of light passing
from air into glass. What is the refractive index
of the glass?
MN
-c
(
A
c
7.2
B
0.75
D
1.8
1.5
13.
The diagram below shows a plane mirror placed
at a distr.nce of 400 cm in front of a man' If the
doctor's test card is fixed at 70 cm behind the
eyes of the man, what is the distance of the image
from the man?
A
C
470 cm
870 cm
B
D
800 cm
940 cm
1
16.
clear erect image can be obtained from a
prism periscope only if the prisms are correctly
positioned. The figure below shows four possible
urr".g.-.rrts of two prisms, with rays of light
drawn. Which is the correct arrangement?
D
C
person stands at point X as shown in the
diagram below. Which of the pins (1, 2,3, 4,5)
will the person be able to see in the mirror?
A
3
X
1
4
2
mtrror
Aray of light in air is incident on a semicircular
block of glass at point P, as shown in the diagram
above. OP is a,radius of the semicircle. Which of
the following ray diagrams shows hirw the raywill
pass through the block and into the air again?
A Pins 1 and 3
C Pins 2,3 and 5
L7.
B
D
Pins 2 and 4
Pins 2,4, and 5
Which one of the following is NOT a ProPerty
the image of an object placed t2 cm in front of
plane mirror?
A It is behind the mirror and laterally i
B It is 12 cm from the mirror.
C A line joining the top of the object to the
top of the image is perpendicular to the'
plane of the mirror.
D
It
is
real.
(
K
f
fr A man whose eyes are 1.50 m from the ground
22. An
optician's test card is fixed 60 cm behind the
A plane mirror is placed 250 cm
in front of the patient. What is the distance of the
image of the card from the patient's eyes?
250cm
310 cm
looks at his reflection in a vertical mirror 2.00 m
eyes of a patient.
away.
The top and bottom of the mirror are 2.00 m
and 1.00 m from the ground respectively. What
distance, iq metres, below his eyes can the man
see of himselfi
A
c
\
i<
I
g:
4
0.25
1.00
the
4, 5)
(
23.
)
The figure below shows
a
(
)
ray ofwhite light striking
a prism. Which of the following statements is
true?
A00
r
0.50
D1.so
B
D 560cm
500cm
If a light ray does not undergo bending at the
boundary between two media, what is its angle of
incidence?
)
B
A
C
c
60"
B 45"
D90"
(
)
\F-.
source of light S is located 6 cm above a plane
mirror and the reflected ray is detected 4 cm above
20:A
the mirror at a horizontal displacement of 72 cm.
The point of reflection from
A
is
A The light
face
does not change direction at the
PQ
B The light does not change direction at the
face QR.
c The light is split into colours only after it
reaches QR.
D The light is split into colours at the face PQ
()
12 cm
A 6cm
C 8.5 cm
B 7.2 cm
D 9.7cm
(
24. The diagram shows a light ray travelling from
)
glass
to
air.
the glass?
Perry
21. The diagams below show the passage of light
through glass blocks.Which diagram is correct?
A
(-
sin 40"
sin 50"
sin 30'
-7-, r+)
srn
Which ratio is the refractive index of
25.- A rectangular glass block when viewed normally
appears to be 5.0 cm thick. What is the actual
thickness of the block if the refractive index of
the glass is 1.5?
B 3.3 cm
A 0.3 cm
C
3.5 cm
(
D 7.5cm
28. A
ray of
light is incident from below the surface
ofwater as shown in the diagram below. Using the
values indicated, calculate the angle ofrefraction
(correct to 2 significant figures).Th. refractive
index ofwater is 1.3.
)
passing from liquid X into air
makes an angle of incidence of 48" as shown in
the following diagram.
26. A ray of light
A
c
29.
27"
500
27. At which point A, B, C or D, will
X
see
oB
the image of the object?
(
".,
lb."*.,
(
)
photographer wishes to take pictures without
being noticed. He sets uP two plane mirrors
A
together with his camera. Which arrangement
of mirrors will allow.the photographer to take
pictures of someone behind the camera?
OA
A
plane mirror
OX
30.
".
an angle of incidence
air to glass, less than critical angle
B air to glass, greater than critical angle
-with
C glass to air, less than critical angle
D glass to air,greater than critical angle
is the most probable emergent ray of light?
BII
DIV
from
A
If the refractive index of the liquid is 1.40, which
cru
)
Total internal reflection takes place when light
passes
AI
B 39"
D 72"
O object
()
ace
31,.
the
Ifan
observer peeps through the hole at the
mirror, the extent to which he can see the metre
rule is between the
A 0 cm and 90 cm mark
B 10 cm and70 cm mark
C 20 cm and 50 cm mark
D 20 cm and 60 cm mark
The bottom surface of a glass block is silvered to
mirror. Which of the following diagrams
act
^s ^
the path of a light ray which
could represent
enters this block through the top surface?
ion
rive
A
shows a light ray passing through
a glass block. The phenomena at X is due to
34. The diagram
:)
because
light
I
II
Ience
white light contains various colours.
any colours striking it are converted into blue
light.
only blue light is reflected.
III
A I,II and III
C
ithou
rirrors
ement
o
A
B
C
D
An object viewed in white light appears to be blue
a1
lf
I
and
III only
B I only
D III only
(
dispersion of light
refraction of light
total internal reflection of light
bending of light
(
travels with speed o, through
medium 1 and then passes into another medium
2,where it travels at speed zr.
The refractive index for medium 1 and medium 2
35.*A ray of light
)
are
nrandn,
respectively.
Which option correcdy
compares the speeds and refractive indices for
N-
Th. diagram shows the cross section of a metre
rule XY with a small hole drilled at the 30 cm
mark. A plane mirror MN is placed in front of
the ruler and is parallel to it.
each medium?
Speed
A
B
C
D
oflight
Refractive index
n, is less than n,
nris greater than n,
n, is less thzn n,
nris greater than n,
o, is less than z,
z, is less than z
vris greater than z,
,u2rs greater than v,
Rule
(reading in cm)
(
hole
M
36.
A ray of red light travels from air to glass
The critical angle for the glass is
-.
v
/
)
A
c
33.5"
45.0"
B 47.r"
D
45.2"
as
shown.
37.
of 50" on the
face of an equilateral prism made of glass will be
White light incident at
A
B
c
deviated only
dispersed only
deviated and dispersed
D totally internally
38.
40.
an angle
reflected
passes from water into air, it is
refracted. What are the changes taking place?
A Its wavelength increases and its frequency
When light
decreases.
B
Its wavelength decreases and its frequency
C
Its speed increases and its wavelength
D
increases.
Its speed decreases and its wavelength
lncreases.
(
)
A pupil set up the apparatus shown below
to
investigate the relationship beween the angle of
incidence (t) and the angle ofrefraction (r) for a
ray of light passing from air into glass.
decreases.
41. Three objects, P,
(
)
Qand R, are viewed through
a plane mirror as shown. When an obstacle is
moved towards the mirror, which one disappears
first and which one disappears last?
light from a ray box
Which of the following is the correct graph of
sin i against sin ri
oo
PO
stn r
Disappears first
A
P./
B
P
c
R
a_
D
stn
l'
\
What is the angle of incidence if the angle between
the incident and the reflected ray is 70o?
35"
70"
B 40"
D800
(
a_
R
P
R(
r
39. The diagram shows a ruy of Lght striking a plane
mirror.
A
c
Disappears last
A'l
1''
A person standing at X in front of a plane mirror
would see an image of Y at position
IS
43. An object O is placed between two plane mirrors
as shown. At which position A, B, C, or D will an
image
NOT be seen?
o
D
)
ugh
[e is
rears
44.
46- John is standing still in front of a mirror. In the
mirror, he sees Jane running towards him from
his back at a speed of 2 m s-1.What isJane's actual
speed?
A
C
47
B 2ms-1
D Bms-l
1ms-1
4ms-1
The diagram below shows how the path
monochromatic ray of light differs when
(
ofa
it is
passed through two prisms.
The given ny diagrams showwhat happens when
a narrow beam of light strikes the medium-air
interface ofperspex, glass, and agar. Arrange the
three media in ascending order of their refractive
indices.
A
B
" C
'
D
45.
Perspex, glass, agar
Agar, perspex, glass
Glass, perspex, agar
Agar, glass,
perspex
(
)
The refractive index for water is 1.33. Which of
the following diagrams does NOT represent the
behaviour
of light as it travels from water into
Why do the paths differ?
A
B
C
D
Glass is more transparent than plastic.
Plastic cannot totally reflect light.
The plastic surface disperses the light.
The critical angle for plastic is greater than
that for
glass.
)
(
F
48. A ray of light passes through a semi-circular glass
block. In which of the following diagrams is the
critical angle marked correctly?
51. The diagram
shows four lamps in front of and
behind an opaque plane mirror. The card prevents
the observer at X from seeing the lamps direcdy,
although the image of one lamp can be seen in
the mirror.
Which lamp's image can be seen in the mirror?
49. A beam oflight travels obliquelyfrom one medium
into another medium of higher refractive index.
All of the following are true statements about the
beam of light except that
A
B
C
D
its soeed increases
its wavelength decreases
its frequency remains the same
it bends towards the normal
52.
The figure below shows a ray of \\ght crossing the
boundary from medium 1 to medium 2.
50. A ray of light travels from medium 1 to medium
2 and is totally internally reflected as shown in
the diagram below. Which of the following
statements is correctl
If the two media
I
I
I
rTledium 3
A Medium 2 has the highest optical density.
B The ray will be refracted towards the normal
when it emerges from medium 2 to medium
1.
The ray will agiin undergo total internal
ref.ection at the boundarybetween medium 2
and medium 1.
D Ifthe
angle ofincidence at medium 2 is larger,
the ray will be able to pass into medium 3.
are plastic and air, which of the
following is correct?
Medium
t2
A Air
B Plastic
C Air
D Plastic
Medium
Refractive index
ofplastic
Plastic
Air
Plastic
Air
sin
sin
sin
sin
sin
sin
sin
F
ti"
P-
a
B
a
c
B
a
()
'::;
-
nd
IILJ
tly,
/a
fJ.
A mirror is tilted at an angle of 30o to the bench.
A ray of light is directed so that it hits the mirror
at an angle of 20" to the surface of the mirror.
corner of the aquarium at S. The light ray from
the slit shines on the water surface PQat an angle
of 40" as shown.
in
.?
If the refractive index is 1.33, which of the
What is the angle of reflection?
A
c
B
D
20"
50"
diagrams below shows the correct path of this
300
70"
)+. Which one of the following is a properry of the
rg the
image of an object placed 20 cm in front of a
plane mirror?
A It is on the mirror and laterally inverted.
B It is 10 cm from the mrrror.
C A line joining the top of the object to the
top of the image is perpendicular to the pane
of the mirror.
D
It
is real.
55. A coin is placed at the bottom ofa tall container
as shown in the diagram. A person looks into the
container so thathis line of sight includes point
P above the coin,.and he cannot see the coin.
When water is slo.wly poured into the container,
the person suddenly sees the coin when the water
reaches a certain level;
What is the
reason for
this?
r of the
V
index
itic
:
)
I
3
a
a
F
a
T/t
56. The diagram shows a side view of a water-filled
aquarium PqRS. An electric lamp, surrounded
by a shield with a narrow slit, is immersed in one
A Lightis
B
Lightfrom
C
The water
the coin.
from water
ofthe water
when it passes
force to
lift up
D ilgnt no. the eye is refractr:d when it Passes
( )
from air to water'
)/. Which of the following does NOT
light
passes
60. The diagram below shows an observer at O
looking straight through a rectangular glass
change
in the glass window panel?
block at an object P.To the observer, the object P
appears to be
,l
j-:'_'
A
;::
::
:'
diminished
B neafer
C moved to the right
D in its true position
:::
:l:-
67. A light pipe consists of a central glass core of
A
C
Velocity
Frequency
B Wavelength
D Direction (
)
)u. A girl of height 1.6 m stands 0.5 m in front of
a vertical plane mirror. The bottom edge of the
mirror is 0.8 m from the ground. What is the
minimum length of the mirror which will allow
the girl to see the whole of herself.)
A 0.5m
B 0.8m
( )
D 1.6m
C 1.3m
59.
h
ray of light travels from air into glass. The
refractive index of the glass is 1.5. Which of the
following pairs could be values of the angle of
incidence and the angle of refraction?
Angle of
incidence
A
B
C
D
27.5
40.0"
60.0"
80.0'
Angleof
refraction
20.0"
60.0"
35.3"
53.3"
A
B
C
D
high refractive index
low refractive index
high refractive index coated with layer of
glass of lower refractive index
low refractive index coated with layer of glass
of higher refractive index
()
62.
When light is refracted in passing from air to
glass,
A
B
C
D
its speed and frequency decrease
its speed and wavelength decrease
its speed and wavelength increase
its wavelength and frequenclr increase
,
)
63. An object is placed in front of a plane mirror as
shown. Which point represents the position of
the image?
(
)
oD
o
64. The diagram shows four objects in front of a
mirror. The card prevents the obseryer's eye from
seeing the objects directly. Which object's image
can be seen in the mirror?
lss
IP
AA
BA
ca
DA
Which of the following statements is NOT true?
A No light is lost through the optical fibre.
B The light in the optical fibre obeys the laws
of reflection.
C
The refractive index of X is greater than the
D
refractive index ofY.
The refractive index ofYis greater than the
refractive index of X.
( )
The diagram below shows the view from the top
of a room PqRS which measures t5 mby 72 m.
An observer O stands at the center of the room
with his back to the wall RS.
15m
card
)
re of
12m
)f
f glass
()
,:
"t
65. The diagram shows how light travels through the
optical fibre of an endoscope used to look into
stomach of ulcer patients. X represents the inner
material of the optic 6bre while Y represents the
outer material.
The minimum width of
a
plane mirror,which must
be placed at eye level on the opposite wall, PQ,
for the observer to be able to see the whole of the
image of the wall RS is
A2m
C 6m
B 4m
D 72m
(
)
Unit 15
Lenses
1.
The diagram below shows the image of an object
convex lens L is used to produce a real and
diminished image of an object O which is placed
at position X as shown.
4. A
formed by a converging lens. The object is at
F: principal focus
converging lens
AJ
CL
2
A
transparent sheet
BK
DM
()
What happens to the image when the object O
now moved to a new position Y?
Nature
with letter "F" is projected
A
through a convex lens on a translucent screen as
shown in the figure below.
B
c
D
Real
Real
Virtual
Virtual
is
Size
Diminished
Enlarged
Diminished
Enlarged
>s
observer
translucenl
screen
The image as seen by the observer on the screen
"FBlctDl
will
be
The diagram shows two rays of light from a point
source P which passes through a lens and forms
clear image on the screen R.When a thickparallelsided glass block is placed between the lens and
screen, the image becomes out of focus.The i
(
3.
can be brought into focus again by moving
A screen towards the block.
B screen away frcm the block.
C block towards the lens.
D block away from the lens.
A
lens is used to form a sharp image of a bright
object on a screen.The top half of the lens is now
covered with an opaque material. How will the
image seen be affectedl
A The bottom half of the image will disappear.
B The top half of the image will disappear.
C The brightness of the image will be reduced.
D The size of the image will be reduced to half
its original size.
()
6.
The focal length ofa thin converging lens is 10
What is the maximum distance from the lens
the object can be placed so that the lens acts as
magni$'ing glass?
A 5cm
C 15cm
B
10 cm
D 20 cm
A thin convex lens is placed on a plane mirror and
an object pin is then moved along the axis of the
lens until an image is seen to coincide with the
object pin when view from above. What is the
distance between the pin and the lens? (Take /as
the focal length of the lens)
and
aced
mage
oblect
ptn
ptn
A
C
11. A
A o.s"f
Bf
D2f
cl.sf
:tOis
B
ray of light falls on a convergent lens as shown
in the diagram. The principal foci of the lens are
marked F.
()
When two parallel rays of light enter a convex
lens with optical centre O, which one of the
following shows correctly the passage of the rays
after passing through the lens?
Which of the following represents the path of
the emergent ray?
AI
cru
L2.
raPo
Iforms
parallel
and
s
im
,ving
he
conven lens of focal length 20 cm is used to
form the image of an object.If the object is placed
-(
.s
is 10
e lens
rs acts as
40 cm away from.the lens, the image that
formed
A
B
C
D
is
13.
upright
virtual
bigger than the object
same size as the object
'i"
'lt'
an object is placed 2I cm from a converging
lens, the image formed is slightly smaller than
the object. Ifthe object is placed 19 cm from the
lens, the image formed is slightly larger than the
object.The approximate focal length of the lens is
5cm
18cm
B 10cm
D 20cm
(
)
is
,
::
If
A
C
A
BII
DIV
:
An object AB is placed in front of a convex lens
as shown. Whlch of the tbllolving best represelrts
i1-re appeirrance of the sharp inra.ge for,.,-r"i)
Which of the following does not determine the
focal length of a converging lens?
A
Refractive index of the material making the
lens
B
C
D
The lens material
The object distance
The thickness of the
lens
('
)
14. In a slide projector,
a converging lens
produced
76.
a magnified image of a slide on a screen. The
diagram shows how the slide, the lens and the
Which of the following shows the
strongest
converging lens?
AB
screen are arranged before the image is focused.
The diagram is not drawn to scale.
"CDA
17. Which
of these devices produces
is smaller than the obiect?
A A plane mirror
To produce a magnified image on the screen,
A distance X must be same as distance Y.
B distance X must be smaller than distance Y.
c distance X must be double that of distance Y.
D distance X must be twice the focal length of
the lens.
f )
15.
B
C
D
a
real image that
A camera
A magniS'ing glass
A driving mirror
)
18'
Point F represents the principal focus. Which of
the following diagrams illustrates the passage of a
ray oflight through a converging lens?
t9.
The figure represents parallel rays from a
object passing through lenses L, and Lr.lh.
emerging from Lrare parallel.
The diagrams (not drawn to scale) below show
rays of light leaving a point. The point is on an
illuminated slide,which is in a slide projector.The
rays are shown passing through the projection
lens and forming an image on a screen. In which
diagram will the image on the screen be a clear
one?
A
lens
B
lens
L2
L1
C
lens
The principal foci of
L, and Lrare respectively
A F,andF,
B Frand\
C F, andFo
D F, for both lenses
est
1
20. With the help of a convex lens, the ray from the
Sun can be used to ignite a match. Assuming a
convex lens has a focal length of .E, what is the
C
D
optimal distance befween the match and lens for
ignition?
A 0.5.rq'
c7.5F
\
)
Which type of image is produced?
A Virtual, upright and magnified
B Virtual, upright and diminished
BF
D2F
(
moves from the principal axis
a converging lens in a direction OP as shown
27. A point object O
that
)
24.
Real, inverted and maqnified
Real, inverted and
diminished
(
The ray diagram below shows the formation of
real image by a converging lens.
)
a
of
in
the diagram.
)
:h of
What is the focal length of the image?
A 3cm
B 4cm
C 7cm
D 10cm
=ofa
I, the image of O, will move initially in the
direction
AIq
CIS
22.
BIR
DIT
25.
The diagram shows the action of a rnagni$ring
glass. Which points on the principal axis
corresponds to the principal focus of the lens?
A cylindrical
convex slab is put under water in a
ripple tank.The figure above shows a series ofplane
water waves passing over the slab. Which of the
following diagrams best shows the wave pattern
after passing over the slab?
:lir
((rr
he
ru
2
D
F4
23.
An
object
O is placed 3 cm away from
(t
a
converging lens of z.focal length 6 cm as shown
in the diagram.
m
()
26.
Converging lenses A and B have the same focal
length, but B is only half the diameter of A. Both
lenses are used to form images of distant objects
on a screen.Which of the following statements is
28. The diagram show how a ray of light is refracted
through a convex lens. Which one of the rays
(A-D)
is
NOT
possible?
correct?
A
B
C
D
For both lenses, distance from the lens to the
screen is the same.
For both lenses, the images are of the same
brightness.
For both lenses, the images are the same size
as the object.
Lens B gives a smaller image than A.
()
29.
27.
A
converging lens focuses a parallel set ofrays
indicated in the figure below.
An object OP is
lens.
as
placed near
a
converging
F is one of the focal points of the lens.
Which one of the rays (A-D) best represents the
path of the incident ray PQafter it passes through
the lens?
If
the lens is tilted to one side as shown,which
is the most likelyway in which the rays will
behave?
A
30.
In the diagram below; a luminous object is located
at O. W X, L and Z are points equally spaced
along the axis of the lens. A real, inverted image
of the object is formed at point Y.
If the object
is moved to
pointW,what happens
to the image?
A It remains inverted at point Y but becomes
smaller.
B It remains inverted at point Y but becomes
larger.
C It moves away from point Y towards lens L.
D It moves away from pointY towards point
An object is placed in front ofa converginglens,
shown below. The image is formed at
as
36.
which position should the object be placed for
the lens L to form a new image which is virtual,
upright, and magnified?
-.
AP
CR
)
rging
Ba_
DS
32. A converging
lens offocal length 10 cm produces
an image 20 cm from the lens. How far is the
object from th lens?
A 6.7cm
B 10cm
lens.
ts the
:ough
C 20cm
D 30cm
(
37.
The human eye contains a converging lens system
that produces an image at the back of the eye. If
the eye views distant objects, what type of image
is produced?
A Real, upright and diminished
B Real, inverted and diminished
C Virtual, upright and diminished
D Virtual, inverted and diminished ( )
38.
Which of the following ray d\agrams correctly
)
33. In the figure shown
below, if the real image of an
object is to be formed at U, the object shouid be
A.
The scale diagram below shows the image I formed
when an object is placed at a new position O. At
placed near
-c
show(s) the paths of light rays through the lens?
()
located
spaced
AP
CR
I image
34. x
raPPens
The above diagram shows the imageYof an object
X formed by a thin converging lens.Which of the
following indicates ghe focal lengtht
:COIIleS
ADF
CHY
;lens L.
; po\ntZ.
()
35.
BDX
DFY
(
)
Which of the following statements about the
image formed by a thin converging lens is true?
A It is diminished and upright.
B It is magnified and upright.
C
D
It
It
is virtual aL-rd iLrr.erred,
is r,rpright and
rea[.
(
A
c
(3) only
B
(2) and (3) only
D
(1) and (3) only
(7),(2), and (3)
(
)
39.
47. A
student arrang€s an illuminated
object, a lens
and a screer, .u.h that
the ,irl
image is
"i,rr.
the dis'lince
ffi:#ili::":-'?::' 5'*d
nxed, h e
.*#::HHkrJili:",,:,1.:"":T
the illuminated object.
Wiri"**f
on the screenl
A blurred, magnified image
,
f,
b. obr.rr,.d
t A blured,
I A sharp in ai_-inirh.Jiriig.
C
age rwice
ri7. of th. object
D A sharp image h"tf the
,h.:l;J'of rn. obiect
(-)
42.
The diagram illustuates
an arrangement in which
fe
jlnage and the
objecr;;;;.i;:'what is the
focal length of the lensl
40. Referring
to the diagram below, if there
is no
parallax between the pin
and its imag.,-*rr^, ,,
the focal length of the
lens?
converging lens
A 5cm
C 20 cm
10 cm
A
C
5cm
15cm
5cm
B
L0 cm
D
30 cm
B
D
15cm
25cm
43. The image formed
by a projector is
magnified, t""l
inverted
"nd
magnified, virtual
and upright
magnified, real and brigirt'
1
I
:
D
magnified, virtual and
irverted
(
)
39. Which of the following
graphs correctly shows
the relationship benveen the resistance R of
43.
wire and its cross-sectional areaA?
B
A
What is the reading on the voltmeter in
potential divider circuit below?
a
100
R/a
A/cmz
v
A/cm2
D
C
A
C
A/cm2
5OV
B 33V
Dloov
(
)
44. A, and Arare two ammeters of negligible internal
resistance. What will happen to rhe readings of
the ammeters if the switch S is closed?
40. When a current of 2 A flows for 5 s through a
Iamp,120J of energy are transformed. How much
charge flows through the lamp?
A 1OC
C 24C
25V
A/cm2
)
47
the
B 12C
D 6oC
(
)
The diagram below shows a circuit connected by a
student who intends to control the brightness of a
bulb. Which of the statements below is correct?
A
The bulb becomes brighter when the rheostat is
adjusted to a higher resistance because it allows
ReadinginA,
ReadinginA,
A
No change
B
Decreases
C
No change
D
Decreases
Increases
Increases
Decreases
Decreases
45. What
is the potential difference across the cell?
more current to flow through the bulb.
B The bulb becomes dimmer when the rheostat
is adjusted to a bigger resistance because it
reduces the potential difference across the bulb.
c The brightness of the bulb cannot be adjusted
because the potential difference across the bulb
D
is constant.
The brightness ofthe bulb cannot be adjusted
because its resistance is always constant.
A
c
()
42. The resistance of a wire is R and its length and
cross-sectionaJ. area are L and A respectively.
When its length is increased to 3Z and its crosssectional are^to 2A,what is its resistance in terms
of
R?
')
A;RJ
Bla
'1
p
46.
440V
720v
B 220V
D 6oV
(
The unit volt is
a flow of one coulomb of charges per second
B a dissipation ofenergy ofonejoule in 1 second
A
C
D
a dissipation of energy, of one
-ior,rle per rrnit
ampere of current flow
a dissipation of energy of one joule per unit
Unit 18
Static Electricitv
1. A
negatively charged rod is brought near
two isolated balls X and Y. X is then earthed
{fliifeirtagily as shown in the diagram.If the rod is
then removed, how would the balls be charged?
4.
A light uncharged conducting
ball
is
moved
towards the positive plate.
nylon thread
+
+
+
+
+
Which diagram correctly shows the charges on the
ball just after it has touched the positive platei
A
B
c
D
X
Y
Positive
Positive
Negative
Negative
Negative
Neutral
+
+
+
+
+
-
Positive
Neutral
-
A
negatively charged oil drop stays stationary
between two charged metal plates P and Qas
shown in the diagram. If the negative charge in
the oil drop is reduced, the oil drop
+
+
++++++++++
+_
+
+
Negatively
16
v
charged oil drop
o
A
c
remains stationary
moves downwards
moves upwards
D
moves horizontallv
B
5.
3. M, N, O and P are pith balls which behaves
follows:
M repels N;
M attracts O and
O repels P.
If P is positively charged,
A N must be positively charged
B
C
D
N must be negatively charged
N mr-rst be positively charged or neutral
N rnust be negatively charge or neutral
(
An isolated conducting sphere P has the charge
distribution shown. A similar sphere Q" which
is neutral and connected to earth by a long wire,
is brought close to P. Which diagram shows the
final distribution of charge on the rwo spheres?
A+--+
C
A
D
XY
6.
D
In order to make both of the following two metal
spheres positively charged, what should be done?
XY (')
"' Metal spheres
".touching each other
' (initially uncharged)
\x
y.
Negatively
charged
tlO
What is the charge carried by a single
o"yg..t
nucleus? [1 electronic charge = 7.6 x 10-1e C]
A 1,.28 x 10 18 C
B -7.28 x 10-18 C
C 2.56 x 1018 C
D -2.56 x 10-18 C
()
Rod
A
B
Remove the rod after separating X and Y.
Remove the rod after earthing Y for a while,
C
D
then separate theEo spheres.
Earth Y for awhile after removing the rod.
Remove the rod and then earth Y for a while
after separating X and Y.
10. An uninsulated
electrostatically because
the charge spreads over the surface
it has no free electrons
A
B
C
D
()
7.
A
3
charged sphere at Y experienced a force of
N to the rightwhen it is placed between the two
charged plates as shown.
metallic body cannot be charged
11.
the charge is lost to surrounding bodies
positive and negative charges neutralise one
another
Two uncharged conducting spheres are placed
apart. Which of the following diagrams best
represents the charge distribution when
^
negatively-charged rod is placed near one ofthem?
r-----1
What is the type of charge on Y and what is the
force acti4g on it when it is moved to the middle
of the two plates?
Charge onY
A
B
C
D
Positive.Negative
Positive,..',
Negative
Force exerted
dD
. \I
.) I\
4.5
N
4.s N
onY
D
12. A Iarge positively-charged metal sphere is
connected to a small negatively-charged metal
sphere by a piece of copper wire as shown below.
Which of the following statements is correct?
D
15
A The large sphere will acquire a net negative
will
('
)
positively-charged pith ball attracts another
suspended pith ball. Which of the following
statements about the second pith ball is correctl
A It must have fewer positive charges.
It
It
It
must be negatively charged.
does not need to be charged.
must be
earthed.
(
)
M
and N are rwo spheres given the same quantity
ofelectric charge. P is a point equidistant from M
and N.
charge.
The charges on the small sphere
neutralized.
p and O
A
B
C
D
16.
moves to P then oscillate between
A
be
C A momentary conventional current will flow
from the small sphere.
D Both spheres are at the same potential after
equilibrium is established.
(
)
'o
>*
13. What will happen if a positive charge
is placed in
an electric field?
A
B
C
D
A force will be
The charge will
The charge will
me
smaller.
The charge will remain positive but become
larger.
(,
In which direction (A, B, C or D) does the electric
field act on a positive test charge at the point pl
()
)
17. In
a given circuit, the current is 0.32 A. If the
charge of an electron is 1.5 x 10-1eC, how manv
electrons will flow past a fixed point in the circuit
1,4. The diagram shows a light positively-charged
spherical conductor X suspended in between two
insulated copper spheres, P and e, which are
connected to a d.c source.
18.
in
1 second?
A
C
1x1018
5x1018
A
B 2x7018
D 8x1018
(
)
negatively-charged rod is brought near a rnetal
sphere which is earthed.
Which of the following
correctly shows how the charges on the riictal
sphere are distributed?
E.H.T
When the switch is closed.Xwill
A move to Qand stay
B move to P and stay
C move [o
oscillate berween p
__
-e
\,/\t
<-lr
19.
An ebonite rod is rubbed with fur and the rod
22.
becomes negatively charged because
A -thifur-has iost some electrons to the rod
B
C
D
the rod has gained some electrons from the fur .-*the fur has gained some protons from the rod
the rod has gained some protons to the fur
()
Y
Y --g
'u+ ew
w
IfW
and Y exert no force on each other, U and X
repel each other, while all other pairs attract each
other, we can conclude that
A Y is neutral
B Ip legativEly eharge-d
C U and X are positively charged
D Y carries a charge which is opposite to rhat
ofU
20. The diagram shows a small conducting
hanging on an insulating thread near to a charged
metal plate.If th-e sphere is given
a
\4
ball
positive charge,
23.
A
conducting sphere S is placed between two
oppositely charged objects as shown.
rt
nylon thread
S is
A
moves away f rom the plate
B remains stationary
C is attracted to the plate and sticks to it
D is attracted to the plate and is then repelled
by it
27.
Two parailel plates X and Y are mounted vertically
and given equal and opposite charges. A light,
uncharged conducting sphere is suspended by an
insulating thread from point P vertically above
the midpoint of O of the line joining the centre
of the plates.
then momentarily earthed with the two charged
objects still in position.Which diagram
resulting charge distribution on sphere
sho*sih.
S?
A
c
24. An
uncharged conductor is placed,between
oppositely charged parallel plates as sholnrn.
Which of the following diagrams correctly
represents the field pattern,'ifrside.:the space
r'.' :
between the plates?
:
battery
If the sphere
is initially placed in contact with X
in the diagram,which of the following
best describes its subsequent motion?
A It remains in contact with plate X.
B It moves to plate Y and sticks to it.
C It moves beck zrnd forth continuorLslli tolrcl'ring
eat'h ol'.rre in trLrrr.
D It moves to point Qand quickly comes to
as shown
25.
A
positively-charged rod is brought close to a
metal sphere as shown. If the sphere is earthed
with a finger,
27.
The diagram
shows an uncharged conductor
placed befween two oppositely charged parallel
plates.
Which of the following diagrams represent
correctly the field pattern in the space between
insulated stand
the two plates?
A
positive charges flow from the Earth to the
sphere
B
C
D
electrons flow from the sphere to the Earth
electrons flow from the Earth to the sohere
it is completely discharged
(
26.
()
nylon thread
pith ball
Dome of Van de Graatf
generator
A pith ball makes contactwith, and is then repelled
by the dome of a Van de Graaffgenerator
sho*r,
in the diagram.Which of the followingwill"rhappen
when an earthed metal plate is brought close to,
but not touching, the pith ball?
A The ball will be repelled to the far side of the
B
C
D
dome.
The ball will be repelled so that it makes
contact with the dome.
The ball will be attracted to the plate, make
contact, and be neutralised.
The ball will be attracied to the plate, make
contact, and then be repelled.
( )
28. When an ebonite rod is rubbed with a duster, the
rod becomes negatively charged. Why is this so?
A The duster gains protons from the rod.
B The duster loses electrons from the rod.
C The rod gains protons from the duster.
D The rod loses electrons from the duster.
29.
When a positively-charged-rod is brought near
but not touching an earthed spherical conductor,
A
the conductor will not be charged since it is
earthed
B
the conductor will be charged positively by
positive ions from the air being repelled
towards
C
D
it
the conductor will be charged negatively by
repulsion of the protons to the Earth
the conductor will be charged negatively by
electrons being attracted from the Earth
30.
In which direction does the elecric field act at the
point P between the two charges shown?
aa
JJ.
P, Q""d R represent blocks of copper mounted
on
insulating stands. At the start of an experiment, p
is given some positive charges, but eand R are
left electrically neutral.
When R is momentarily earthed, which of the
following statements describe the charges on e_
and R correctly?
P
31.
A
positively-charged rod
is pushed close to
a
suspended conducting foam ball which is charqed
positively
as shown.
Qand R both carry positive charges.
Qand R both carry negarive charges.
Qcarries negative charges but R carries
D
positive charges.
Qremains neutral but R carries negative
charges.
represent the forces on the ball?
ABC
+
+
+
+
+
+
+
A pupil wants to charge
a metal ball by induction,
using a strip of polythene. She uses the following
steps but not in this order.
1 The metal ball is earthed momentarily.
2 The polythene strip is brought up to ihe ball.
3 The polythene strip is removed.
4 The polythene strip is rubbed with a woollen
cloth.
Which of the fo[owing is the correct sequence.
of stepsl
A 4,2,7,3
c 2,3,4,1
B 4,!,2,!
D 2,4,3,1 (
(
)
34. X and Y are two light metal balls suspended using
nylon thread. When a positively-charged rod
was placed between these two balls, ball X was
attracted towards the charged rod but ball Y was
repelled away from the rod.
Which of the following diagrams correctly
32.
A
B
C
+
+
+
+
+
+
+
--+
repelled
Which of these is the correct conclusion about
the charge on each ball?
BallX
A
negative
B negative or
C
negative
D negative or
only
neutral
only
neutral
BallY
positive only
positive only
positive or neutral
positive or neutral
(.
)
35. Which of the following
represents
the electric
field of a negatively-charged hollow sphere?
A
39. Why is a positively-charged object made neutral
(discharged) by someone touching it?
A Protons flow from the obiect.
B Electrons flow from the obiect.
C Protons flow onro the obieit.
D Electrons flow onto the obj..t.
( )
40.
Which of the following is/are method(s)
to
produce a charged sphere?
I
II
III
By friction
By contact
By induction
A III only
c
I and III
only
B
D
and II only
I, II and III
I
()
36. A
positively-charged rod is brought close to (but
not touching) an uncharged sphere. Ifthe sphere
is earthed,
A
B
C
D
is repelled by the rod
is attracted by the rod
becomes positively charged
becomes positively charged on one side and
negatively charged on the other
A
negatively-charged rod is brought near to the
cap of a charged gold{eaf electroscope. The leaf
'earthed'
or 'grounded' object
buried underground
insulated from other electrical devices
C connected to zero ootential
D touching the floor through an insulator
B
()
42.
The two uncharged metal spheres, R and
38.
rise a little further
fall
a
little
stay in the same position
-.
rise or fall depending on the charge of the
electroscope
Two charged polystyrene balls,
suspended
(
X
from O and come to rest
and
' ')
Y,
are
as shown.
R
s
positive
positive
B negative
negative
A
c
Which of the following is truel
()
S,
shown in the figure below are separated while the
negatively-charged polythene strips is held near
R. The resulting charges on R and S are:
of the electroscope will
A
B
C
D
is
A
it
()
37.
47. An electrically
!)
negative
positive
D positive
negative
43. An insulated
charged rod R is to be used to give
to a conducting sphere S, by
induction. Which of the following procedures is
46.
a permanent charge
The lower part of a cloud has a-positive
charge.
The cloud discharges in a flash ofiightning.
correct?
A
B
C
D
44.
Move R close to S; connect S to earth;
remove earth connection from S: remove R.
Move R close to S; connect S to earth;
remove R; remove earth connection from S.
Move R to make contact with S: remove R.
Move R to make contact with S; connect S
to earth; remove R; remove earth connection
from S.
()
In which direction do electrons and conventional
current flow?
Electrons
Current
A
B
C
D
Two light conducting balls suspended on insulated
threads hang in the position shown below. This
shows that
47.
A
downwards
downwards
upwards
upwards
water tap
column
is
of wa
downwards
upwards
downwards
upwards
that
(
)
a
ced. A
charged plastic
placed
water. The water deflects a little, as shown in the
diagram.
i
I
I
I
I
I
i
j
t
I
I
i
A
i
B
I
c
I
I
i
D
I
the balls are oppositely charged but not
necessarily equally charged
the balls are equally and oppositely charged
the balls are equally charged and both carry
the same charge
one ball is charged and the other is uhcharged
()
I
I
j
I
I
I
i
t
L
t
+
I
I
I
t
I
I
t
I
45. Three different rodii were charged by rubbing.The
following observations were made on bringing
each rod close to the others: rod 1 repelled rod
2,rod 1 attracted rod 3. Which of the following
could be the arrangement of charges on the rodsi
R:d 1
Rod2
Rod3
A
B
(-
D
+
+
T
+
This deflection occurs because the surface
water at X
A
B
C
D
of
has become negatively charged
has become positively charged
passes negative charge to the plastic strip
passes positive charge to the plastic strip
('
)
48.
A rod, made of an insulating material carries a
positive charge after it is rubbed with a woollen
cloth.Which one of the following explanations
50. When a plastic rod is charged negatively by
friction,
A it gains electrons only
is
B
C
D
correct)
A
Friction causes positive charges on the rod to
B
become negative.
Positive charges are transferred from the rod
to the cloth.
C Electrons are transferred from the rod to the
cloth.
D Electrons are transferred from the cloth to
therod.
49.
(')
When a perspex rod is charged negatively by
rubbing itwith silk,
A
B
C
D
it
it
it
it
gains electrons
gains neutrons
loses protons
loses electrons
It
It
It
gains more electrons than protons
loses protons only
loses more protons than
electrons
(
51.
How is a positively-charged rod discharged by
earthing it?
A
B
C
D
Protons flow from the rod ro the Earth.
Protons flow from the Earth onto the rod.
52. A
charged polythene rod can be discharged by
A
B
c
Electrons flow from the rod to the Earth.
Electrons flow from the Earth onto the rod.
()
it
passing it above
earthing
a flame
bringing a positively-charged object near it
D bringing a negatively-charged object near_rt
(
-
Unit 17
Current Electricitv
C Both the ammeter and voltmeter
would burn
D
In the above circuit, when the
out.
The voltmeter would indicate zero
reading.
resistance of the
variable resistor is increased.
A the ammeter reading increases
B the voltmeter reading increases
C the ammeter reading decreases
D the readings remain unchanged
12 V d.c. supply
(r
2.t
,
o
battery
(negligible
internal
resistance)
The resistors P, Qand R in the circuit above have
equal resistance. Ifthe battery is supplying a total
power
of I2W, what is the power dissipated as
heat in resistor R?
A2W
c4w
3.
B 3W
D6w
(
A3
B3
c72
D72
5.
1
t
4
Determine the amount of charge that passes
through a point in a conductor in coulombs if
60 rrLA flow in 10 minutes.
436
c 767
860
D600
(
6. A cell of e.m.f, 3.0 V passes a current of 1.0 A
through an external circuit for 1 minute. If the
cell has an internal resistance of 0.5 O, how much
energ'y is lost from within the cell in ioules?
A30
c90
1
What would be the most probable result?
A Thc rrrrrrrrcter ,,vould bLrn or',r.
B The liqht bulb would burn or-rt.
4
()
)
Eugene wishes to find the resistance of a light
bulb. He connects an ammeter and voltmetei as
shown in the diagram below.
What are the voltage across and the current
through ONE element?
Voltage in volts
Current in amperes
B60
D18o
(
)
The heating element of an electric iron takes a
current of 2.0 A from a 250 V supply. What is
the rate of production of heat in the element in
wattsl
A
c
L25
1000
B 500
D4000
(
)
8.
Which of the lamps in the circuit below has/have
the maximum brightness? (Assume identical
lamps are used.)
I
()
12.
A
c
9.
P
S
The effective resistance between terminals P and
o.
Qin the circuit below is
B
andT
Qand P
D P andT
()
The figure below shows a circuit which contains
two identical lamps. When the switch is closed,
which of these statements best describe what
happened to lamps LL andL2?
415
c30
820
D40
13. A dty cell of e.m.f 3.0 V has a wire connected
f72 C ofcharge passes through
amount of chemical energy is
A o.2s|
A
Ll
is brighter but L2 doe6 not light up.
B I.1 does not light up but L2 is brighter than
before.
C L1 and L2 xe both brighter than before.
D LL and L2 both will not light up. ( )
t
tfr
1:1
2-.7
(
represents the voltage-current relationship
semiconductor diode?
Bv
for
a
)
14. How much work is done in moving an electron
between two points X and Y in the circuit shown
belowl (1 e = 1.5 x
10-1e
C)
12V
B t:2
D 4:7
Which one of the following graphs best
Av
B
D36J
4.0J
Tne resistance of wires X and y are in ratio of
2:1 whereas their lengths and diameters are in the
ratio of 7:2.The ratio of the resistivities of X :y is
A
c
11.
c
electrical energyl
3.61
A
7.92 x 1018J
C 3.84 x 10-18 J
7.28 x
D 3.84 x
B
10-18J
10-18J
,F
151
Two of the wires P, QR and S are to be connected
to the points X and Y to form a complete circuit.
18.
In the circuit, all resistors are identical. If
the
current at P is 0.50 A, the current from the batrery
IS
A
c
t9
0.50
1.50
B
A
A
7.25
L
(
)
What will happen to the brightness of
the
lamps P and
D 2.ooA
Qif
the resistance of the rheostat is
increased?
XY
Which two wires wo ld give the highest
ammeter reading?
A PandQ
C Rands
i
I
B QandR
D PandR
(
)
I
I
I
I
I
[For Qrestion 16 and 17]
I
t
j
I
I
I
The diagram below show four identical lamps connected
in
series
with the mains.
1
A
B
C
D
Pa-
dimmer
dimmer
brighter
brighter
brighter
dimmer
dimmer
brighter
(
)
i
Which of the following graphs shows the
relationship between current I, and voltage V, for
a tungsten filament lamp?
AI
240 V mains
I
I
I
I
I
I
16.
The voltage markedon the lamp is
A
c
3OV
720v
B 6OV
D 240V
17. The power rating of the lamp is
A
c
120W
480w
B 240W
D 960W
)
2L. A dry-battery will
deliver 3000 J of energy to a
small 2-watt electric motor before the battery
is exhausted. The motor wili stop running after
mlnutes.
A 500
c50
22.
A piece of steel wire is held between the two clips
in the circuit shown.
24.
B
100
D25
The reading of the ammeter in the first circuit is
3 A.In the second circuit, a resistor of 200 O has
been added.
Which of the following changes will make the
bulb dimmer?
A
B
C
D
2A
What is the reading of the ammeter in the second
circuit?
25.
Interchanging the positions of the bulb and
the wire
Using a longer length of the same wire
Using a shorter length of the same wire
Using a thicker steel wire of the same length
as the original one
(
)
The diagram shows two 6
toaT2Vbattery.
A
B
C
D
23.
6
Wlamps connected
3..4'
slightlyless than 3 A
slightly more than 3 A
about3OOA
Which ofthe following statements
A The ammeter reads 1 A.
Wires of various lengths and circular
Length ofwires/cm
Diameter/mm
1.0
2.0
3.0
4.0
.
IC
D
cross-
sectional areas were made of the same material.
If the lengths and diameters of the wires were as
shown below, which of these would provide the
highest resistance?
A
B
c
D
[
26.
is
NOT correct?
The total power dissipated by the lamps is 12 W.
fhe voltmeter reads 6 V.
If
the filament of the lamp Y breaks, the
voltmeter reads zero.
In the circuit diagram shown below, the current 1
delivered by the 6 V accumulator will be _-.
2.0
3.0
1.0
2.0
(
A
less than 2 A
C more than 2 A
B
2h
D infinitely
large
27. What is the value of R if voltmeter V read 4 V?
A
3.3
B 5.0c)
D 75a
C)
C 6.0 c)
The filament of one of the bulbs breaks.What
happens to the ammeter reading and to the
brightness of the remaining bulbs?
(
)
Ammeter
28. In the diagram below; what are the readings of the
voltmeter V and the ammeter A?
J_t
6.0
reading
Bulb brightness
A
Increases
lncreases
B
C
unchanged
decreases
unchanged
unchanged
D
decreases
decreases
Three resistors of resistance 7 A,
2
e
and 3
C)
respectively are used to make the combinations X.
Y and Z shown in the diagrams.
v
X
2A
A
B
C
D
ReadinginA
2.OA
2.OA
3.OA
ReadinginV
2.0v
4.0v
2.0v
4.0v
3.OA
29. The equivalent
resistance between
Y
and
Z is
silver plate
Which of the following gives the combinations
in order ofincreasing resistance?
A
C
32.
A
c
30.
2.0a
4.00
. B 1.3c)
D 7.2o
(
KYZ
YXZ
B XZY
DZXY
(
VN
)
Three similar light bulbs are connected to a
constant-voltage d.c. supply as shown in the
diagram. Each bulb operates at normal brightness
and the ammeter (of negligible
registers a steady current.
resistance)
What physical quantity is
gradient ofthe graph?
A
B
C
D
resistance
1/resistance
r'vork done by the charge
power
described
by
the
T_
t
:
33. Which diagram shows the I/V
characteristic
graph for a conductor that obeys Ohms Law?
A
B
C
D
BI
AI
brighter
stays same
dimmer
brighter
(
Three 1,0 C) resistors were connected in a circuit as
shown in the diagram below. What is the current
flowing through resistor P?
0
DI
CI
Lamp2
Lamp 1
brighter
brighter
brighter
dimmer
10v
rl
34. When a p.d. of 2 V is applied
across a resistor,
of energy are converted. What charge flows
through the resistor?
0.20 c
B 5.OC
10 J
A
C 72C
J).
D 2oC
(
c
)
[n the circuit below, the voltmeter reading is
1.5 V and the ammeter reading is 0.30 A.If the
resistance
A
38.
0.20
0.67
A
A
A
A
B
0.33
D
1.0
Which two ammeters in the diagram below have
the same reading?
of the ammeter is 1.0 O, what is the
resistance R?
1.5 V
A 4.0c)
c 5.00
36.
B 5.0 c)
D 7.0 a
The diagram shows a potential divider circuit.
A A, and A,
C A, and A"
What happens to the brightness of lamp 1 and
lamp 2 as the contact X is moved towzrrds end P
B A, andA,
D AsandA, (
)
Unit 19
Practical Electricitv
1.
1
electrical
device with
metal casing
). The diagrams show the inside of a 13-A plug.
Which one is correctly wired?
A
brown
green
For safety purpose, an earth wire is connected to
the metal casing of the electrical device in the
above circuit. If there is a fault occurring such
and
yellow
that the casing becomes 'live'when the device is
switched on, which of the following may occur?
I
II
The fuse
blue
will blow.
Overloading occurs, possibly resulting in
a
fire.
III
Electrical device remains at live ootential
if the switch is ooened.
even
A I only
C I and II only
2.
B II only
D II and III only (
)
In the circuit below, when
S is closed which two
fuses (rated values are labelled) will be blown?
t-2(10 A)
lrz v
]t.1to
oy
F 4(5 A)
l'n
]un
A F, and F, only
C \ and Fo only
3. Many houses have
B
o
F, and F, only
and Fo only
D F,
an electricity meter that is
read so that the eost of the electricity used by
the customer may be calculated. What does the
electricity meter record?
A Charge
C Energy
4.
C
B Curent
D Power
30A
green
and
yellow
brown
(
)
An electric oven rated at 3.5 kW operates from a
240 V mains. What is the correct fuse ratins for
its plug to be connected to the rnains socketi
A 13A
15A
C 2OA
D
B
D
6.
The chief reason for insulating the wires of
domestic electric circuit is to
A
B
C
D
a
reduce heat loss
prevent corrosion of the wires
prevent short circuit
give a greater current carrying capacity
voltage supply
()
Which of the following lists the three bulbs
from dimmest to brightest?
A
C
7. An electric heater
is rated'240V,2000 W'.It is
used on a socket marked'30 A maximum.Which
is the most appropriate fuse to use in series with
the heater?
A 4OA
C 1OA
B
30A
D 3A
(
Q,R
Q,RR
P,
B P,R,Q_
D Q,R,P
9.
kettle is to be connected to a
V mains supply socket using a flat-pin plug.
5 A and 13 A fuses are available.
240
)
heating
element
(
Which fuse should be used, and in which part of
the circuit should it be oositioned?
A 5 A fuse in the live wire
B 5 A fuse in the neutral wire
C 13 A fuse in the live wire
D 13 A fuse in the earth wire
( )
How many units of electricity are consumed when
a 4000 W electric oven is used for cooking for 30
minutesl
A 2.0 units
B 6.0 units
C 120 units
D 1.2 x 10s units
()
10.
An
electrical toaster has a plate underneath
giving the following information: 220-240 V,
750 W. The most appropriate fuse to put in the
plug would be
A
c
11.
134
34.
B 5A
D 1A
(
The cost of running a2kW heater and a 100 W
bulb in a small room for 4 hours at 25 cents oer
kWh is
A
c
12.
fi2.10
fi0.42
-Ihree
)
13. 1'750 W electric
We earth an electrical appliance to
A prevent the fuse from blowing
B prevent the power supply from overloading
C avoid having a current flowing through our
body
D avoid excess current flowing through the
appliance
(
B $0.84
D $0.21
(
L4.
A torch rated at 3 \4 0.5 A
and a refrigerator
light rated at200 V, 10 W are connected in series
across a 200 V household power supply. What
will happen when the circuit is switched on?
A fhe torch will immediately blow out, and so
no current will flow in the circuit.
B The torch will immediately burn out, but
the refrigerator light will appear to operate
normally.
C
D
)
24W light bulbs are connected in turn to
different voltage supplies (of negligible internal
resistance) with very long leads as follows.
The torch will emit very little light, but the
refrigerator lightwill appear to operate normally.
The torch will appe r to operate normally, but
the refrigerator light will emit a weak light.
()
15. Which one of the following diagrams shows
the correct connection for the two limps rated
'240 V,50 W' and'240 V 30 W'in a household
circuit? [L stands for LIVE wire, and N stands for
18. An electric heater is rated at 2 kMt
g
Electrical
energy costs cents per kWh. What
is the cost of
using the heater for 3 hoursl
A 6 cents
B 16 cents
C 24 cents
D 48 cents ( )
NEUTRALl
79. A student sets up the circuit
lamp does not light up.
as shown below. The
What will make the lamp light up?
A Changing the supply to a 12 V battery
B Replacing the supply with a 6 V 50 fr" u.r.
source
C
D
Inserting a fuse
Reversing the connecions of the 6 V supply
D
20.
76.
The diagram below shows how the plugs ofseveral
electrical appliances are connected to an adaptor.
What happens when a 250 V,2500 W water
heater is connected to a mains supplyusing a plug
fitted with a 13 A fuse?
A
B
C
D
77.
The
The
The
The
fuse in the plug melts.
heater burns out.
heater runs at half power.
heater works normally.
(
)
The following diagram shows the label attached
to the base ofan electric kettle.
Voltage
Power
Rating
Fuse
if this kettle
4 minutes?
A 3x250x4J
B 3x1000x4x60J
C 13x250x4x60J
Combined resistance is smaller than the
smallest resistance used.
Energy consumption is high.
(
)
25OV
3
kW
13
27. A light bulb is marked 240V,60 W. How many
such light bulbs can be connected to a 100 V
A
How much electrical energy is converted to
thermal energy
C
D
ELECTRIC KETTLE
Operating
Which of the following statements is incorrect?
A Current drawn is increased.
B Voltage in the power is increased.
is switched
on for
supplythrougha5Afuse?
A8
c48
B20
D72
22. fl'ie kilowam-hor-rr is a unit of
A charge
B energy
23. An appliance in a house uses 12 kWh after4
hours
C There is risk of an electric shock.
The insulation becomes damaged.
If the cost of energy consumption is
per kWh, the rate of energy consumed
of operation.
6 cents
and the cost payable are
Power/kW
24.
27.
Cost/cents
A3
872
c48
D48
D
A typical 3-pin plug is shown in rhe
diagram
below.
7')
1B
18
e68()
In the diagram below, P, Qand R are wires to
be connected to the terminals of a plug. How
should
P,
Qu"d R be connected to the three
pins?
Which of the following is the correct conne*ion
of the three wires in the cable to the terminals a,
b and
A
B
C
D
Earth
AP
BR
CP
Da-
Live
a_
a_
R
c?
Terminal a
Terminal b
Terminal c
Live wire
Neutral wire Earth wire
Neutral wire Earth wire
Live wire
Earth wire Neutral wire Live wire
Earth wire
Live wire Neutral wire
()
Neutral
R
P
a_
R
P
28.
()
Four appliances
given power rating
are
of
A
25. The diagram below shows a 10 {,50 W heater H.
connected in parallel to a 10 V,25W heater H^.
B
c
D
29.
10v
of
separately connected to a230 V supply.Which
the following is an incorrect fuse rating?
PowerRating
1.1kW
Fuse Rating
2.2kW
3.2 kW
3.4 kW
10A
13A
5A
1sA
(
)
Many household appliances are earthed via the
mains plug. Earthing is considered necessary
because
A
B
the earth wire is needed as a spare conductor
the appliance is protected against a short
circuit
C
D
If
P, and Prare the powers dissipated in H, and
H, respectively, which of tbe following is cirrect?
A
26.
Pr
P2
50w
25W
50w
B 25W
C L2.5 W
6.25W
D 100w
50w
Electrical equipment should not be used in damp
conditions.What is the r-n:rir-r hztzardi
A The equipment becomes too hot.
B
The fuse keeps 'blowing'.
static charge needs to travel into the Earth
the electric circuit is not complete without it
()
30.
Which of these would be the most suitable fuse
for a circuit in which an electric appliance rated
2.5 kW is to be connected to a supply voltage of
240W
A 2A
ClOA
B 54
D13A
r
)
31.
If the mains voltage is 200 V, what is the
36.
maximurn number of 50 W 200 V lamps that
can be connected in parallel in a lighting circuit
which is protected by a 5 A fuse?
820
D4
,q.40
c10
32.
(
All lamps in this circuit are rated at !2V,36 W.
A, B, C and D are 5 A fuse. Which fuse will melt
when the switch is closed?
12V
)
An electric heater is connected to a 3-pin socket.
The current in the 'live'wire is 1 A. The potential
difference between the 'live' and 'neutral'wire is
240 V. Which of the following correctly describes
the current and the potential difference befween
the 'neutral' and 'e arth'wire?
Current in
Potential difference
'neutral'wire
between'earth'and
(A)
'neutral'wire (V)
A
0
B
C
1
0
1
240
D
0
240
33. Which
I
II
III
0
a1
of the following will cause a fuse to melt?
Short-circuiting
Over-loading
Open circuit
A hair dryer contains
a heater. The heater has fwo
coils connected in parallel.
Which of the following statements is correct?
A
A current of 2 Aflows throuqh each of the
B
C
There is the same voltage across both coils.
The total resistance of the coils is the sum of
D
The total voltage of the supply is sharec.
(
between the coils.
coils.
A I only
B I and II only
C I and III only
D II and III onlv
their separate resistances.
)
J+. The correct colour code for wiring a machine to a
30
A three-pin plug
38.
is
Livewire Neutralwire Earthwire
A
Brown
Blue Green/yellow
B
Blue Green/yellow Brown
Brown
C Green/yellow Blue
D
Blue
Brown Green/vellow
()
35.
The diagram shows the three wires of an electrical
supply connected to a water heater.
wlre
Electrical
supply
200
.Blue wire
v
R=25Q
vettow}no green
The fuse in a particular circuit'blows'regularly.
This could be because there is a direct connection
between
I
II
III
A
B
C
D
strips wire
What are the cuffents flowing through the wires
live and neutral.
live and earth.
earth and the body of the appliance being
when the heater is switched on?
used.
A
II are true.
and III are true.
I, II and III are true.
III only is true.
I
I
Water
heater
Brown Blue
B
C
and
D
(
)
Yellow and green
strips wire
wlfe
wfie
8A
8A
8A
8A
8A
8A
OA
OA
OA
8A
8A
0A
(
)
Unit 20
Electromagnetism and
Ele ctromagnetic Induction
1.
The diagram shows two long straight parallel wires
X
and Y carrying current
into the paper
in the
3. A
same direction
small plane coil connected
to a
sensitive
galvanometer is placed between the poles of an
electromagnet.
P
What is the direction ofthe resultant magnetic field
at P, the centre of the line joining both wires?
A
direction of
resultant magnetic field
t
X
t-----
O
I
-O
P
X
o
P
-J----- -O
I
J
Switch S was closed and then opened again.
Which of the following observations is true?
direction of
resultant magnetic field
A
CX
O-
l--+---O
B
direction of
resultant magnetic field
D
2.
No resultant magnetic field
(
C
)
Two long insulated wires carryring equal currents
are placed perpendicular to each other as shown.
D
4.
The points R
qR
The galvanometer shows no deflection as long
as the switch remains closed.
The galvanometer shows brief deflection in
the same direction on closing and opening the
switch S
The galvanometer shows brief deflection in
one direction on closing and in the opposite
direction when opening switch S.
The galvanometer shows no deflection at all
since there is no relative movement of the coil
with respect to the electromagnet. ( )
The diagram below shows a circuit with a wire
connected to abattery through the switch S. The
compasses X and Z are placed above the wire and
the compass Y is placed below the wire.
and S are allat equal distances
from the wires. At which point(s) is/are the
resulting magnetic field out of the paper?
-
A P only
C PandQ
B Qonly
D RandS
r
When
)
S is closed,which of the
followins
diagrams correctly shows the orientations of the
comDass needles?
Unit 16
Magnetism
The figure illustrates a perm{nent
S
N
horseshoe
magnet and a keeper. The keepeq which is easily
magnetized, is placed across and in contact witir
the poles of the magnet when the magnet is not
z
used.
unmagnetized
iron bar
horseshoe
magnet
An unmagnetised iron bar is broughtvery close to
a magnet at regions X,Y, and Z in turn.What can
be said of the attractive force felt at X, Y, and Zl
A
B
C
D
keeper
Z
Weak
Strong
Strong
Weak
Strong
Weak
Strong
Weak
Which combination below correctly gives the
Weak
Strong
Strong
Strong (
material which should be used for the magnet and
keeper, and the polarity of end X of the keeper
when it is placed as shown in the figure?
)
Magnet Keeper
A Soft iron Soft iron
B Soft iron
Steel
c Steel Soft iron
D Steel Soft iron
is brought near an object X. It
X moved away from the magnet.
A strong magnet
is observed that
What is object X?
PolarityofX
North
South
North
South
()
N
5.
magnet
Which of the following diagrams below corecdy
represents the magnetic field pattern around a
current-carrying straight wire?
A A
B
c
D
3.
piece of iron
A piece of magnet
A piece ofcopper
A piece ofsteel
()
iron and
steel, which is best used
and
electromagnets?
transformers
Between
Tiansformers Electronialnets
A
B
c
D
Steel
Steel
Steel
fron
Iron
Steel
Iron
Iron
(
In the diagram below, two wires are placed close to
each other and carry current in the same direction.
I
Which one of the following shows the correct
magnetic field?
I
.I
A
B
C
D
i
bend away from X
bend towards X
fall to the ground
()
staysrill
Which of the following will NOT increase the
strength of the magnetic fietd produced by a
solenoid?
IJse more rurns per unit length of solenoid.
4
B
C
D
tI
I
I
Increase the strength ofthe current.
Replace the d.c source with an a.c source of
the same value.
Use a steel core for the solenoid instead of
()
au.
9. The diagram shows a compass placed between
two
identical magnets in the Earth's magnetic field.
7.
The figure shows a strong magnet holding a chain
fiv9 small iron rings. If a weak magiet, X is
brought close to the end of the last rin[, thg ring
.of
If one magnet is reversed, as shown below, in
which direction A, B, C, or D, will the compass
needle point?
will
B
D
<I
()
;
10.
Which diagram
shows
the correct electric bell
C
B
D
circuit?
They help to keep the magnets F and G
strongly magnetized.
They help to protect the magnets from
deformation.
(
)
is positioned in an east-west direction
and a plotting compass is placed at each end.
t3. A brass rod
brass rod
N
I
D
Which diagram shows the correct directions of
the compasses?
o
o
o
o
"O
c
11.
Which of these statements about
induction is correct?
A Magnetic induction explains why
B
C
D
magnetic
D
a
unmagnetized magnetic material may be
attracted by a magnet.
Induced magnetism is always permanent.
Magnetic induction is the same as
electromagnetic induction.
The material to be induced must be in
(
physical contact with magnet.
o
o
o
14. Each of the following material displays magnetic
properties at room temPerature excePt
B steel
A cobalt
C
D
nickel
manganese
(
)
t2. Two permanent magnets F and G are kept
in position by 2 soft iron keepers J and K and
separated from each other by a wooden spacer.
Magnetism is induced in the two soft iron keepers.
What is the function of,the soft iron keepers?
15. N-S is a magnet which affects the two
PQandXY as shown below.
steel bars
N
S
attracts
P
a
N
S
repels
o
P
N
S
attracts
X
N
S
attracts
X
it
can be deduced that there is
permanent magnetic north pole zt
From this,
AP
CX
A
They help to increase magnetism of the
magnets F and G.
They help to prevent the magnets F and G
from losing all their masnetism.
Ba_
DY
-.
(
76.
polariry ofX and y of the U_shaped
Y9::
electromagnet shown?
the
X
A North
B
Y
South
South
D South
North
shows a small magnet hanging
on
to the end of a solenoid , lrying
^
I.
What will happen to the magnet
as the iron core.
is inserted into rhe solenoidi
A It will move rowards the solenoid.
B It will move away fromth. ,ole.roid.
C It will move towards the solenoidand rotate
through 180 degrees.
D Ir will *ou.
from the solenoid and
"*uy
rorare through
180 degrees.
(
North
North
c
1,9.
South
)
20. Three identical metal bars p,
e and R are
suspected of being magnets.
Tert
carried out
and it is found that there is attraction
^r.
between
A bar magnet is cut at its centre, resulting
in the
formation of two separate magnets.
Whar are
the polarities.of regions p and
t*o
{"iifr.
magnets?
A
B
C
D
18.
P
,r.*
a,
South
South
North
North
North
North
pofes 1 and 6, between 2 and, 4,
and between 2
there
is
repulsion
between poles
Td 9.However,
2 and3.
F
PqR
-.-l
Without
South
F-l r:;l
making anyfurther tests,which
these statements is correctl
South
of
Lines of magnetic force
f
||
III
A
never cross overalways go from north to south.
are closer together when the
magnetic field
is weak.
II
and III are true.
B I and II are true.
I and III are true.
D ' Onty I is true.
I,
c
()
21. It 'can be concluded that a bar ofmetal
if-..----.----.-.
A a copper needle is attracted to it
B
(
)
C
D
is a magnet
both ends of a compass need.le are attracted
to the same end of a bar
one end of a compass needle is repelled
by
one end of the bar
a copper needle is repelled by
it
(
)
22.
The diagram below shows the top view
ofa
Which ofthe following best illustrates the pattern
that results?
magnet suspended in a magnetic fielJ.
The magnet will
A move to the right
B move to the left
C rotate clockwise
D rotate anticlockwise
23.
()
Two magnets are placed next to each other as
th1*l in the diagram. Whar are rhe polarities of
P,
q,X
and Y?
P
o
X
Y
()
I
Pa-x
AN
BN
CN
DS
S
S
N
N
Y
N
S
S
N
S
S
S
N
25. The diagram below
shows
the position of
a
compass needle when a compass is placed between
rwo magnets..
()
P
o
Which of the following combinations is likeh to
be poles ofP and Q
Pole ofP
Pole of Q
IN
N
US
ilIN
IVS
A I and II only
B III and IV only
C I and III only
D II and IV only
S
S
N
26. A compass needle is placed near one
end
of a coil
of wire. When a current is passed
through the
coil, the co[rpass needle points
i" ,i. direction
snolr/n.
B
C
D
ft.,":._db will point
north
+
!
:
n
27
.
a
piece
ofiron
is attracted by the south
pole
(
closer to the magnetic
if
the current in the coil is increased
the same current flows in the
opposite
a
is artracted by
points north
resisrance is placed in series
r,i,if,
direction
,f..l"f.""ia
rne compass is nroved nearer
to the coil
A p..t-^1.1t magner
surrace.
is placed on a flat hor
n plotting compass
shown.
izontal
is placed on the spot
X
Which one of the following statements
is most
likely to be truel
ut Y is not.
t X is not.
material.
!rwhich directionwill the plotting compass pointi
(Ignore any effect of the
nt,hrl"s;.t#itrol
bar magnets.
(
ABCD
32.
28. Which of the following
devices does NOT
electromagneti
A a magnetic relav
B an electric bell
C a loudspeaker
D
29.
".omp"ss
needle
t resting
placed in
use
ona
front
plotting
compass
Wren the turntahlerotates in a clockwise
direction,
(
the compass needle
)
A
B
C
D
rotates clockwise
rotates anticlochvise
oscillates
does not move
)
aa
JJ
Two bar magnets are placed parallel to each other
with cpposite poles facing each other as shown in
the diagram.
38.
Two needles hang from the end of a bar magnet
inclined towards each other as shown in the
diagram.
oX
oY
oZ
At which points X,Y,Z may neutral points
A Xonly
C XandYonly
exisr?
B yonly
D X,yand.Z (
)
34. A
shield designed to protect a cathod.e_ray tube
from effects of external magnetic fields should be
made
A
C
35.
of
steel
lead
B
D
The reason for this is that
A the needles are induced temporary magnets
B the ends ofthe needles are both north poles
C the ends ofthe needles are both south poles
D
copper
soft
iron
(
the needles have become permanently
magnetised
(
One end P of a metal bar attracts the N-pole of
a compass needle. What does this possibly show
about the barl
39. A soft iron nail, Xy, is placed within a current
carrying solenoid for avery short while
as shown
below. When the nail is removed from the
solenoid, which of the following statements is
true?
36. During
A
B
C
D
magnetic induction,
ofwire must be present
a current is induced
soft iron is magnetised
there must be change in magnetic field
a coil
A
End X will be able to repel a similar iron nail
which has been magnetised.
B End X will be aftracted to the north-seeking
pole of a bar magnet.
()
c
s7. Which of the following statements best describes
induced magnetisml
EndYwill be repelled by the south-seeking
pole of a bar magnet.
D End Ywill poinr to the North pole ofths
earth when freely-suspended.
.,()
D
A magnetised
needle, swinging freely,
coming to rest pointing North-South.
(
)
)
)
40. Which one
of the
following shows
arrangement of magnetic dipoles inside
a magnetised iron?
A
B
c
a
the
This is because
A
B
C
D
of
piece
-+.
;\ ->l.l i,l
; ir /,r'
41.
to plot
magnet
A the
a
nded
magnet
the compass needle is easily demagnetised
there is a vacuum inside thl ."s.
#th.
42.
the Earthb magnetic field has no effect
on
the needle
(
a
43-
,
B Brass
Dlron
(
B
Y after the strokins.
XYwill be a wea. Permanent magnet after
track
op.rrJ.-'-
be produced at
X and a north
the
stroking
The poles on the magnet
will be inverted
after the stroking.
The needle of a plotting compass would
not
point to X after the stroking.
(
A :9il of copfer wire wrapped
could
45.
around a core
Which one of
the following combinations irould produce
the
be used as an electromagnet.
strongest electromagnet?
)
operates the track by closing the
switch S that
connects the coil to the batteryt
but the
A south pole will
pol.e at
)
Numberofturns Core
Few
Soft_iron
Few
Steel
Soft-iron
.Many
Many
Steel
A
B
C
D
The diagram below shows a model
railway track
controller. It consists of a coil M, and
iron rod N
attached to the track p by a brass rod
O. Someone
will not move backwhen the $^rit; i,
A
)
plotting compassl
leed-le
A
Aluminium
C Steel
I
\
D
Which marerial is most suitable to make
the
of
I
I
C
compass
D
copper bar Xy is stroked with a permanenr
magnet as shown in the diagram.
Wtii.t, of the
following statements is correcti
'.F
-+
_>
_>
A smal
IC
rf;
t
D
->
->
->
)
A
44.
rlEa
->
-+
-+
alternating current shouldhave been used
no force acts when the switch is opened
the switch needs to be closed twice
the brass rod is nor magnetic
(
A.
46.
(
)
The diagram below shows the position
of a
compass needle when the .orrrp"r, is
placed
between two sftong magners.
P
o
Which of the following combinations is likely
be poles of P and Q!
P
AN
BS
CN
DS
a-
N
S
S
N
ri
)[
..I
-;I
47. It is desired
to produce a magnet
as
shown below.
49. A_plotting compass is placgd
near
When there is no
cr
:ompls s needle
jl,Jfi
Earth's magnetic'"t",:"i.lt
field is not
a
solenoid.
,',",l#t{l:
"
n.gtigiti.J
Which of the following windings would give the
desired magnet?
A
What is the direction of the plotting compass
when there is a current from X to Yl
A
f-
50.
@
D
@
In which device is a permanent magnet used?
A An electric bell
B An electromagnet
C A plotting compass
D Arelay
48. The diagram illusrrates an
apparatus used to
show the expansion of iron. The iron is heated by
passing a current through a coil.
@
@
51.
(
)
The diagram below shows a simple electric beli
with four leads QR, S andT and a batterywith
nvo"leads. To give a continuous ringing sound,
which is the correct way to connect up the
circuitl
After the switch is closed, what is the moyemenr
of the pointer and what is the magnetic state of
the rod?
A
B
C
D
Movementof
Magnetic state
top ofpointer
To the right
To the right
To the left
To the left
Magnetisetl
Demagnetised
Magnetised
ofrod
Demagnetised
Battery
(
A
)
Between R and S
B Between Qand S
c Between Qand R
D Between QandT
Anotherwire
Between QandT
Between R and S
Between S andT
Between R and S
(
52.
Four compasses are placed beside
two bar magnets
as shown below.Which one
ofthe four compasses
has been wrongly magnetisedl
56.
Which of the following electromagner
has the
o ---
weakesr magneric
AB
'100
fieldl
turns
50 turns
soft
iron
l- '*s*, I
;:!
()
)J.
A pupil wants to identifi which materials
!
,t
'l
are
magnetic. He uses an elecftomagnet.
Which pair
m_etals will it pick up?
9f
A Cobalt and iopper
B Iron and ulu-iniur.,
C Nickel and cobalt
D Copper and steel
(
100 turns
50 turns
)
54.
magnet
oP
soft iron
Fis. (ii)
P
iron
o
N
magnet
S
A yagnetic
compass is brought near in
turns to
ends P, Q,N and S.tt north-pole
ofth" .omp"rs
"
will point towards
Iron
Magnet
A Qonly
N only
B Qonly
S only
c both ends
S only
D both ends
N only
J).
()
t
Z. A
is plac-ed in a magnetic
field
flows trom eto p.In
as
di
re move?
c-O@{D _o-%
P9
5.
o
()
The diagram shows a cross-sectional view of a
simple d.c. motor. The circles represent the sides
of a rectangular coil which is placed berween the
poles of a permanent magnet. The current in the
left hand side of the coil flows into the plane of
the diagram; the current in the right hand side of
the coil flows out of the plane of the diagram.
left
()
8.
Which diagram below shows the correct direction
in which a current-carrying wire will move when
placed in a magnetic field?
right
oo
AO fr=On
What is the direction of the force experienced bv
each side of the coill
Left Hand Side
RightHand Side
A Towards N
Towards S
B Towards N
Up
Down
D
Down
Up
I
which
cup
6.
''
A metal rod is pulled to the right with
:.1ij
velocity
o through a magnetic field as shown.
magnetic field acting
perpendicularly into paper
i-.-
trl
a
Do'->
XXX
X
X
X
X
X
X
X
X
X-
X
X
X
X
X
rJ
()
9.
Two long wires AB and CD are connected to
batteries as shown below In which directions will
the wires move?
X
Which of the following statemenrs is true?
A The induced current flows from Qto P
B
C
D
because P is at a higher potential.
The induced current flows from P to Q
because P is at a higher potential.
The induced current flows from Qto P
because Q*is at a higher potential.
The induced current flows fiom P to Q
because
is at a hieher potential. (
WireAB
A
Wire CD
B
t
I
I
D
t
10.
The diagram below sllows
an electon' e' located
in a magnetic field.
the direction
ofthe deflection,ifany,
Hfjlje
the magnetic fieldl
A
lr^lht::,rh
th1P."B'
::1." of the
B
Page
e o;"";'"s
D No deflection
(
13. Two parallel \4.
experience,,..jT:. ::"il:-Jtrit
effects of the current.
Which
tr no
*:.moves magnetic force on the electron when
rt
+ towards the rigl.rside of the page
th. tol or the page
lowalds
:\- rnto
the page
D out of thl p-age
(
shows rhe correct air..tio.r,
on both rhe wires *rr.r,
tt.y
other?
)
77. The diagram below
shows the circular clockwise
path of a charged particle
in fi.Ii. ih."iir'..rio.
of the field i. out of th.
"
paper.
"a,h.
ior;.;..,
"r. ;;;;..r
A O-+ +@
B
C O->re
D
*il'.l,:
following
acting
each
@_+ +_e
o
()
c
o
14. In the diagram
.to
a
O1
^
at,
a
L
and
M
are two loosely
o:tt,y ;,;";',',il'3:::.n T 1'il
mercurv.
tra
a
below,
hung wires (one
;m::::i,,;
I
+
+
I
at
a
o
I
\a
\/
h
ao.roj
a
o
Ignoring the effect of gravity,
which of the foflowing
correctly describes a possible
state of charge of the
particle and the,r"tur"
of the fieldi
.
I
I
ID
charge
negative
Positive
negative
positive
15.
magnetii
(
about to enter a magnetic
fierd. Jhe
the field is into the page.
X
X
A
field
magnetic
electric
electric
)
12. The diagram below shows
a beam of electrons
X
When S is closed,_
both L u"a M
-o*
both L and M moye to the
I
left
ID L]- and M will aftract to each other
and M will repel each
oth.r---
.TIgn,
dir..tio., of
xxx
X
X
X
X
X
X
X
into page
magnetic
x
sh
wr".r,"ih.r"ll-rilT",':J*'J?,*H"-.
magnetic x
X
(
)
A Iight metal rod is moved to
the right on two
conducting
rails as
into page
A
x
xx
xx
xx
xxx
xxx
XXX
xxx
)
at a higher potential and current flows
from P to Qthrough the rod.
D Qis at a higher potential and current flows
()
from Qto P through the rod.
C
Qis
18.
At the moment when the magnet is enterins and
leaving the coil, the polarity of the two e#s of
the coil
76. Under the influence of the magnetic field in the
diagram below, the stream of electrons is
stream of electrons
A
B
c
D
17.
l*l
PQis
m
I
-.
deflected towards the north pole of the magnet
deflected towards the south pole ofthe magnet
deflected into the plane
deflected out ofthe plane ofthe paper
(
Polarity of P
AN
BN
CS
DS
A
student knows that 2 wires, P and Q are
carrying a2 A. current and a 1 A current but
he does not know which wire is carrying which
current. He arranges 3 magnetic compasses, J, K
and L between the wires P and Qsuch that the
compass marked K is at the mid-point between
the two wires. (See plan view below)
79.
:ooo3
What is the direction of the currents in P and
Polarityof
(magnet entering
the coil)
)
A
Q
(magnet leaving
the coil)
N
S
N
b
()
straight wire connected to a galvanometer is
placed between the poles of a magnet.
Q
and which wire carries more current?
Current direction
Wirewith
inPandQ
2,4.current
P
a_
P
A both same direction
B both same direction
C
D
different direction
different direction
a_(
galvanometer
Which change will
cause a current
in the
galvanometer?
the wire in direction 1
-A "Modng
B
C
D
Moving the wire direction 2
Moving the magnet in direction 2
Moving the magnet in direction 3
20. The circle in the diagram
outlines the point where
a
beam
enters a magnetic field.
particlesi
Whaiwill
happen
A
23.
of electrols,T:_rng ,,into the
paper,,
straight wire is_ placed berween
the poles of
a magnet. How should the
wire U.
io th.
produce the greatest induced
_i,r.a ,o
."rr.", i"^,#**l
O
A
A
Deflect to the left
B Deflect to the right
c Deflect upwardsD Deflect downwards
B
c
D
()
2L.
Yl:"
-,ug":., was moved into the coil of wire
I the
shown in
diaqram, there was
on the sensitive ,i.t.r.
"
r_ulir."airrg
24.
The diagram shows a brass
rod supported on rwo
copper rails which are connectJ
to . banery.
The north pole of a magnet
is placed as shown
beneath the rails.In whiir
,h;'di;;;,'o.,r'o, u,
"f
C, D does the brass rod .*p.ri.r..;;;;;;;
Which change would increase
the size of the
reading?
(
22.
placed atpointX on the
cardboard
I lmlassinisthe
diagram. n. oo*f, p"i.lr,f,"
::1.*"
compass
needle will point towards
a, b, C
",
Ol
25.
The figure below shows two
iron rods suspended
ji{..
*, ;;;ilo,ar.
uy side inside a oil by
When the circuit is closed atk,whaiwi[;;0p."
to the rods?
I
elastic cords
I
I
iron rods
A
B
c
D
26.
Two longparallelwires PQand RS are connected
to batteries as shown in the diagram. pecan
move freely in any direction but RS is fixed.
pushed
pulled out
ofthe coil
to the right
left
right
left
right
into the
coil
A
left
B
left
c right
D right
'PR
siationary
no
no
no
no
deflection
deflection
deflection
deflection
{
29.
Jamie holds a wire between two strong magnets
as shown
QS
is 2 A.There is an upward force on the
wire.
When both the switches are closed, what happens
to wire PQ
A PQmoves towards RS.
B PQ*moves away from RS.
C PQ*moves in a direction into the plane of
D
in the diagram. The current iir the wire
upward force
the paper.
PQmoves in
a
direction out of the plane of
the paper.
27.
Which of the following correctly shows
the
magnetic field produced by an electric current in
a straight wire?
A
B
C
WhenJamie increases the current to
D
upward force
e<_
---+
-t
+
I
(
28.
A
C
30.
will
increase
stay the same
{A
B decrease'
Dreverse-.
the
(
The diagram below shows a uniform,magnetic
field. A metal bar PQis swinging back and forth
across it as shown. The motion produced during
one complete to-and-fro oscillation started from
the position shown.
The diagram below represents an experiment
demonstrate electromagnetic induction.
N
S
Which of the deflections observed in the
galvanometer is correct when the north pole
tl-re magnet is
of
Which ofthe following is corect?
A A curent flows from P to Qthen Qto P.
B A current flows from Qto P then P to Q
C An alternating e.rn.f in the direction PQthen
D
ND
Y3.
An alternatins e.m.f in the direction
A.rectangular coil is placed within
a magnetic
field as shown. Curr.niflows
Qlt, RS and Sp of the coil as"lorrgth.,rO.1rq,
,.1,r1r*r.Jiy
31.
The N-pole of a bar magnet is
pushed into
JJ.
solenoid. An electromotive force
is inao.el
moyes the galvanometer needle
to the
tr,.
arrows.
a
tn"t
left.
I
I
l
galvanometer
'I
i
I
I
direction of
magnetic field
--+
Which combination shows the directions
of
forces acting on the ,id., ofth.
.oit>
qR RS
^ __PQUpwards Inwards Downwards
I
IC
D
sp
I
I
:
D
Inwards
_Upwards No force D"*^;;;; No force
Downwards No force UpwardrNo force
Downwards Inwards U;*r.d,
Upwards
Pulling
a N-pole out of the solenoid
Pushing a S-pole inro the solenoid
fulling the solenoid u*^y fro^-^N_pot.
Pulling the solenoid, uiuy fro_
()
32. The diagram shows a magnet
moving into
solenoid.
34.
a
solenoid
"'Slpof.
()
A horizontal wire carnes a current
in the direction
shown in
diagram
below between the
.
the
magnetic poles N and S of two
magne ts. What is
the direction of the forcel
A
Which of the following changes
would cause the
needle to deflect in the opporit"
A Push the solenoid towards tfr"direction?
*ffi
pole awayfrom the solenoid
I\, lvlove
l*,h:thesouth
magnet
D
same speed to the
I
I
and the solenoid at the
right
Move the solenoid
fro^the
--'E6'r!and
--- mag.net
^i^y
keep the magnet stationary
)
From N to S
B From S to N
c In the direction of the current
D Vertically upward
35.
(
)
Th9 figure below shows a brass
rod, between the
poles of a horseshoe magnet, resting
on two bare
horizontal wires.
36. Two identical solenoids S, and S, are suspended
coaxially and symmetrically by four long thin
wires so that they may swing freely as shown in
the diagram. When the switch K is closed, what
38. When the generator below is operating, choose
the correct graph from A-D corresponding to the
variation of voltage with time across the resistor
R.
happens to the sblenoids?
A
A One turns in a clockwise direction, and the
B
voltage
other in an anticlockwise direction.
B They both turn in a clockwise direction.
C The move away from each other.
D
They move towards each other.
(
)
37. Two nails P and Qare placed inside a coil, as
shown in the diagram below. P is free to move
but Qis fixed. The coil
is
joined to
a
battery and
time
C
a
switch.
Ttime
(
39. The diagram
below shows part of a d.c motor-
When the switch is closed, P
A shoots out of the coil
B moves to and fro
C
D
Q
moves towards
moves awayfrom
current into paper
a current
out of paper
o
Q
As seen from the front. the coilwill
A rotate clochrise
B rotateanti-clockwise
C
D
experience no force
experience no torque
40. The diagram below shows three
pairs of parallel
wires with currents in the directions
,ho*i-
l
I
42.
lt
:: I
-,!
:i
'I
Which forces do the pairs ofwires experiencel
XYZ
A Attraction None
Attraction Repulsion
"^ i\one
r_
Attraction
D Repulsion Attraction
Repulsion
Aftraction
None
Repulsion
()
47.
The diagram below shows
ryrng horizontallv.
a
generator with its coil
Which
ments is NOT true?
d is set up in the coil
A An
whi
B
An alternatins cu*enr
C
A direct current flows in lhe coil when
the bar
D
rl lilffitJ,,,l,nu.
is
the. bar magnet is moving.
magnet comes to rest.
frequency of rhe current is equal
to the
F.
frequency of the oscillating magnet.
(
)
43. The diagrams below show
the front view of the
coil ofan a.c. generator.The coil is
beine rotated
axis though O-in a uniform ir"gnetic
:::1..neld
between the N and S poles of
permanent
magnets.
Which diagram A, B, C or D best describes
the position of the coil when th.
i.rd,r..J .._.e
WIT type ofgenerator is this and atwhat
position of the coil will the generator
produce
maximum induced e.m.f ?
^
t
I
ID
ofgenerator Coilposition
a.c. generator
vertical
d.c. generator
vertical
a.c.generator horizontal .
d.c. generator
fiorizontal
'
()
Try"
F
,t.
!t'
is between zero and its maximum
value and is
increasing?
JG'.[i i]l a[t
tl
E
Is E,
()
Unit 21
Transformers and
C.R.O.
1,. The diagram below shows some of the important
parts ofa cathode-ray tube.
3.
In a cathode-ray tube, a m
is heated electiically and
?
u'
They can be attracted by a
Which type of charge; do
and the anode have?
A
B
C
D
Emitted particles
Anode
Negative
Negative
Positive
Positive
Negative
Positive
Negative
Positive (
+
Which of the following changes in the voltage
would result in the position of the spot on the
screen moving towards the top?
{C
Decreasing
Decreasing
V,
V,
B
D
4
The diagram shows a trace on an oscilloscope
set_.at 1.0 V per cm on the vertical
axis and 1.0
millisecond per cm on the horizontal axis.
Increasing V,
Increasin[ V,
2. A
'| cm
S
()
step-down transformer supplies electricity to
a house at 200 V through the transmission lines
with a total resistan ce of 2.0 e. If the houses are
consuming electricity at 400W,what is the power
+
/
cm
ll
\
I
\
I
V
\
\
I
\ /
generated from power stationl
B
C
D
1.5
2.0
2.0
250 '
l2S -,
25g,,;'. '
:.(
. ,::
t:-:
,
q_:j: 'a: '_
--:.:'nj
w
B
408W
C 800w
D
808
A
400
W
)
a'
:!'iil:'
:
j
,'.1
-.; .ia:'::.'
-i , j
..'
i .."t'
.:
'
5.
Which of the following transformers can change
240V a.c.to !2 V a.c.?
8. A
pupil sets up a model transformer as shown
below.
B
40 turns
800 turns
40 turns
80 turns
12 turns
It
is connected to 2.5 V d.c. supply. Both lamps
have a voltage of 2.5 V.Wh"t do., the
pupil
notice about the lamps?
240
turns
100 turns
500 turns
50 turns
Lamp P
normal brightness
very bight
normal brightness
dim
A
()
B
C
D
6.
9.
In some countries,
very
B 100
c 110
D 100
7.
(
10
In
IB
C
D
signal is
A I2Hz
C 0.09H2
B 0.033 Hz
D tI.TLHz
(
a
C It makes the cables stronger.
D There is less energy lor-, from the cables.
()
)
The waveform of the a.c. voltage as
seen on the
screen of the C.R.O. is shown in
the figure.
The time base is set at 15 ms Cm-l,
and the y_
gain is set at 2.0 V cm-l. Each division
on the
screen represents 1 cm. fhe frequency
of the
electriciry is transmitted at
hig_h__voltage over a distance using
overhead
.."b1::.Why is this voltage
^r, "drr"r,t"i.?
can traveifaster
along tie cables.
I ItElectricity
is safer for engineers to repair cables.
t
110
100
1000
Lamp Q
not lir
dim
very bright
very bright
a cathode-ray tube, the electrons are
produced
by applying an electric field to the f-plates.
E
by heating a metal filament.
by ionisation of air.
from a fluorescent material.
(
)
11. Abar
magnet is moved into the coil ofwire which
is connected to an oscilloscope.
What is the voltage across Rl
A 0V
C 72V
B 6V
D 744V
13. The diagram
shows the y_plates of
the carhode
ray oscilloscope. Th.e upper plate y,
is connected
to negative
by a wire
,h#.r, while the
_charge
",
lower plate Y, is earthed
bar magnet
oscilloscooe
The trace on the oscilloscope is shown below.
What will be seen on the screen if an elecrron
passes through the Y-plates and the time_
base circuit connected to the X-plates of the
The magnet is then moved back from the coil at
a greater speed. Which trace shows this?
oscilloscope is switched on?
D
-l::.
t4.
72.
The circuit in the diagram below shows a resistor
R connected to 6 V d.c. power supply through a
transformer of hrrns ratio 1 : 12 (turns in primary
coil : turns in secondary coil).
::
Three coils P,Qand R are
core as shown. P has Nturns
haveN/2 turns.Two iden
200 V,100 W are
that the transformer has
IfP is connected to a
400 V, the current
.4
iid an iron
Rboth
at
Assume
of 100%.
iron core
200 V
100 W
W
V
power supply
A
c
0.25
1.00
A
A
B 0.50 A
D 2.00 A
15.
Why is the core of a transformer
made of ironl
ical conductor.
Jhe secondary winding on
a transformer
18.
three ouders:
coPPer.
and
;;;il.r,
_"f".\
has
z inirn;* ;;."dr"orrn.
coil and Y in such a position
that there
turns berween X and y
and 40
and Z, as shown below.
ed and demagnetised.
permanenr
k
are
16. The diagram illustrates
the fface obtained on the
screen of an oscillosc
appried,"
;illil;::ff[:
fi:l,T:'ff
1 i:
tle.voltage sensitivity is
of the following correctly
age and frequency
of
the
A
B
19.
A 4V,725 Hz
c 4Y,83.3H2
17.
B
D
s v, g3.3 Hz
8V,125
Hz (
V
c
120V
D
40v
80v
24OV
60v
BOV
diagram shows rhe fface
obtained
]1_following
wnen a generator is connected
to the input
terminals of a cathode ray
oscilloscop.. ar-rrr*i.rg
Y^-gain is set at 10 V/cm
and the time_
:n.
lli:
base is at 2-.0 ms/cm,1vhat
i, th. f..q,r."., ,n.
rotation of the coil and the
"f
ou,p,r,
t
The diagram shows a
murti-tap transformer. The
number of turn; in the
p.i_"r1,
-,rlJiooo ""a
the number ofturns in
the secon larycoil berween
P
and
160
120V
pJ*
the generatorl
e. eand R, and R;;;i;.-roiio
50 respectively.If an Ar.rrr",irrg
""0
V
is applied_to the primary
coil, between which two
points will an
outp.rt of 20 V be obtained?
"...
*i*,,rrr0
secondary coil
A
B
A PandQ
C Qand
S
PandR
D Qand R
B
c
D
Peake.m.f./V
Frequency/Hz
15
15
500
30
30
500
200
200
";i "*. "r
20
y