Phy mock-p1A

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OXFORD UNIVERSITY PRESS
NEW SENIOR SECONDARY PHYSICS AT WORK
(SECOND EDITION)
MOCK EXAMINATION 2018
PHYSICS PAPER 1
Time allowed: 2 hours 30 minutes
This paper must be answered in English
GENERAL INSTRUCTIONS
(1)
There are TWO sections, A and B, in this Paper. You are advised to finish Section A in about 50 minutes.
(2)
Section A consists of multiple-choice questions in this question paper, while Section B contains
conventional questions printed separately in Question-Answer Book B.
(3)
Answers to Section A should be marked on the Multiple-choice Answer Sheet while answers to Section B
should be written in the spaces provided in the Question-Answer Book. The Answer Sheet for Section
A and the Question-Answer Book for Section B will be collected separately at the end of the
examination.
(4)
The diagrams in this paper are NOT necessarily drawn to scale.
(5)
The last two pages of this question paper contain a list of data, formulae and relationships which you may
find useful.
INSTRUCTIONS FOR SECTION A (MULTIPLE-CHOICE QUESTIONS)
(1)
Read carefully the instructions on the Answer Sheet. After the announcement of the start of the
examination, you should first insert the information required in the spaces provided. No extra time will be
given after the ‘Time is up’ announcement.
(2)
When told to open this book, you should check that all the questions are there. Look for the words ‘END
OF SECTION A’ after the last question.
(3)
All questions carry equal marks.
(4)
ANSWER ALL QUESTIONS. You are advised to use an HB pencil to mark all the answers on the
Answer Sheet, so that wrong marks can be completely erased with a rubber. You must mark the answers
clearly; otherwise you will lose marks if the answers cannot be captured.
(5)
You should mark only ONE answer for each question. If you mark more than one answer, you will
receive NO MARKS for that question.
(6)
No marks will be deducted for wrong answers.
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
1
Section A
There are 33 questions. Questions marked with * involve knowledge of the extension component.
1
When a liquid-in-glass thermometer is placed into a beaker of ice at temperature –17.8 C, the
length of the liquid column becomes 2 cm. When it is placed in the mouth of a person whose
body temperature is 37 C, the length of the liquid column becomes 10 cm. The thermometer is
then placed in a room and the length of the liquid column becomes 8.2 cm. Find the temperature
in the room.
2
A
24.7 C
B
27.1 C
C
29.8 C
D
32.7 C
On a hot summer day, the wind blows from the sea to the land. Which of the following is a
possible reason?
3
A
The sea is hotter than the land.
B
The land is hotter than the sea.
C
The sea is a better conductor of heat than the land.
D
The land is a better conductor of heat than the sea.
When 15 g of water at 25 C is poured onto a hot frying pan, all the water becomes steam at
100 C. Find the decrease in temperature of the frying pan.
Given: heat capacity of frying pan = 350 J C–1
specific heat capacity of water = 4200 J kg–1 C–1
specific latent heat of vaporization of water = 2.26  106 J kg–1
A
6.25 C
B
13.5 C
C
96.9 C
D
110 C
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
2
4
An object moves along a straight line. The following figure shows the displacement–time graph
of the object.
displacement
0
t1
time
Which of the following figures best shows the velocity–time graph of the object?
A
0
C
t1
time
D
t1
velocity
0
velocity
0
5
B
velocity
time
t1
time
velocity
0
t1
time
Daniel is standing on the roof of a building. He throws a ball vertically downwards at an initial
speed of 12 m s–1 from 25 m above the ground. Find the time taken for the ball to reach the
ground.
A
1.34 s
B
2.08 s
C
2.26 s
D
3.79 s
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
3
6
In the following figure, the two ends of an inextensible string is fixed on hooks A and D. A ladle
is hung on the string. The contact between the ladle and the string is smooth and the system is at
rest.
A
B
C
D
E
string
ladle
If the two ends of the string are now fixed on hooks A and E, how will the tension in the string
change?
7
A
Increase
B
Decrease
C
Remain unchanged
D
Cannot be determined
A block of mass 6 kg is placed on a rough horizontal ground as shown in the following figure. A
force of 10 N is applied on the block at 30 to the horizontal and the block accelerates at
0.6 m s–2.
10 N
30
Find the friction acting on the block by the ground.
A
1.4 N
B
5.06 N
C
8.6 N
D
12.3 N
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
4
8
Six children are playing tug of war as shown.
Amy
Bob
David
Celia
Edmund
Florence
Which of the following are action-and-reaction pairs?
9
(1)
The friction acting on Bob by the ground and the friction acting on the ground by Bob
(2)
The tention acting on Celia and the tention acting on David
(3)
The weight of Florence and the gravitational force acting on the earth by Florence
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
A block of mass 8 kg slides down a slope at an intial speed of 3 m s–1 as shown. The friction
between the block and the slope is 50 N when the block is moving and the block stops at the
bottom of the slope.
3 m s–1
2m
Estimate the distance travelled by the block in this period of time.
A
2.42 m
B
3.14 m
C
3.86 m
D
4.58 m
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
5
*10 Two balls of different masses are projectd horizontally from a table surface at the same time.
The initial speeds of the two balls are different.
Which of the following statements is correct?
A
The two balls will reach the ground at the same time because they will travel the same
distance before reaching the ground.
B
The two balls will reach the ground at the same time because they have the same
acceleration along the vertical direction.
C
The two balls will not reach the ground at the same time because they have different
weights.
D
The two balls will not reach the ground at the same time because they have different
initial speeds.
*11 A tennis ball is struck at a position which is 8 m away from the net and 1.5 m above the ground.
The height of the net is 0.9 m.
tennis ball
net
1.5 m
0.9 m
8m
If the ball flies horizontally just after being hit, what is the minimum speed of the ball at this
moment so that the ball could fly pass the net?
A
14.5 m s–1
B
18.7 m s–1
C
22.9 m s–1
D
32.3 m s–1
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
6
*12 A satellite of mass m revolves around the Earth in a circular orbit of radius R. The orbital speed
of the satellite is v. If another satellite of mass 2m revolves around the Earth in a circular orbit of
radius 2R, what is its orbital speed?
A
B
C
D
13
2v
v
v
2
v
2 2
The following figure shows an object placed in front of a plane mirror.
Which of the following figures correctly shows the image of the object?
A
B
C
D
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
7
14
A vibrator is attached to one end of a long stretched string. At time t = 0, the vibrator is switched
on and produces a wave on the string. The following figure shows the displacement–time graph
of the vibrator.
displacement
0
time
t1
Which of the following figures best shows the displacement–distance graph of the wave at
t = t1? Take the distance to be zero at the position of the vibrator.
A
0
C
distance
displacement
0
D
displacement
0
15
B
displacement
distance
displacement
0
Which of the following must have changed when the refraction of wave occurs?
(1)
The frequency of the wave
(2)
The travelling speed of the wave
(3)
The wavelength of the wave
A
(2) only
B
(3) only
C
(1) and (3) only
D
(2) and (3) only
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
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8
distance
distance
16
A beam of laser passes through a single slit and arrives at a screen. Diffraction occurs at the slit
and a diffraction pattern can be observed on the screen.
laser source
single slit
screen
Which of the following can increase the degree of diffraction?
17
(1)
Reduce the intensity of the laser.
(2)
Use light with a lower frequency.
(3)
Use a slit with a smaller slit width.
A
(1) only
B
(2) only
C
(3) only
D
(2) and (3) only
A stretched string is fixed on a pole at one end and a vibrator at the other end. The distance
between the pole and the vibrator is 50 cm. When the vibrator vibrates at a frequency of 25 Hz,
a stationary wave is formed as shown in the following figure.
50 cm
vibrator
pole
Find the wave speed along the string.
A
4.17 m s–1
B
6.25 m s–1
C
8.33 m s–1
D
12.5 m s–1
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
9
*18 A monochromatic light beam passes through a plane transmission grating and forms bright
fringes on a screen. The distance between the second-order fringe and the central fringe is
measured to be 39 cm, while the distance between the screen and the grating is 2 m. The grating
has 200 lines per mm.
2m
39 cm
light source
plane transmission
grating
screen
Calcualte the wavelength of the light.
19
A
478 nm
B
488 nm
C
498 nm
D
508 nm
A longitudinal wave is travelling along a spring as shown below. At the moment shown, the
rings X and Y are respectively at a centre of compression and a centre of rarefaction.
direction of wave
X
Y
Which of the following statements are correct?
(1)
The displacements of X and Y are both zero at this moment.
(2)
At this moment, X is moving to the right, while Y is moving to the left.
(3)
X and Y are vibrating in antiphase.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
10
20
A sound wave is travelling from the air towards a water surface. Which of the following
statements is correct?
21
A
Total internal reflection may occur when the sound wave reaches the water surface.
B
The frequency of the wave may change when it enters the water.
C
The speed of sound in the water is lower than that in the air.
D
None of the above
Three metal spheres X, Y and Z are placed near each other as shown in the following figure. All
three spheres are supported by insulating stands. Sphere X carries a positive charge, sphere Y is
neutral, while sphere Z is earthed.
X
Y
Z
Which of the following figures best shows the distribution of electric charges in the spheres?
A
B
X
Y
Z
C
X
Y
Z
X
Y
Z
D
X
Y
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
Z
11
*22 Two point charges P1 and P2 respectively carry charges of 4Q and Q. They are separated by a
distance d.
d
4Q
P1
Q
P2
There is a neutral point between P1 and P2 at which the electric field strength is zero. Find the
distance of the neutral point from P1.
23
A
2
d
3
B
3
d
4
C
4
d
5
D
9
d
16
Which of the following statements correctly describes the function of the earth wire in an
electrical appliance?
A
It directs the current to the earth if the current in the live wire is too large.
B
It directs the current to the earth if the current in the live wire is not large enough to melt
the fuse.
C
It directs the current to the earth if the live wire accidentally touches the conducting case
of the appliance.
D
It directs the current to the earth if the neutral wire accidentally touches the conducting
case of the appliance.
24
The power rating of an electric heater is ‘220 V, 2500 W’. Assuming that the heater is ohmic,
find its resistance.
A
3.37 
B
4.40 
C
11.4 
D
19.4 
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
12
25
An iron rod is placed at rest on two smooth horizontal rails in a uniform magnetic field pointing
into the page. The rails are connected to a battery and a switch, as shown in the figure below.
iron rod
rails
Which of the following will happen after the switch is closed?
26
(1)
The rod will move.
(2)
The rod will produce a magnetic field.
(3)
An e.m.f. will be induced in the rod.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
A retangular coil of side lengths 5 cm and 8 cm is placed inside a uniform magnetic field of
strength 0.03 T, as shown in the following figure.
axis
5 cm
8 cm
The coil rotates about the axis when a current of 2 A flows through it. What is the maximum
value of the moment acting on the coil about the axis?
A
1.2  10–4 N m
B
2.4  10–4 N m
C
3.6  10–4 N m
D
4.8  10–4 N m
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
13
(For questions 27 and 28) A coil is connected to a light bulb and placed inside a uniform magnetic
field which varies with time. As shown below, the direction of the magnetic field is perpendicular to
the plane of the coil.
magnetic field
P
to light bulb
Q
The following graph shows how the magnetic field varies with time. The frequency of the field is f and
the maximum magnitude is B0. Take the magnetic field pointing upwards as positive.
magnetic field
B0
0
t1
t2
time
–B0
27
Which of the following correctly describes the direction of the induced current at time t1 and t2?
At t1
At t2
A
no induced current
no induced current
B
from P to Q through
from P to Q through the
the light bulb
light bulb
from P to Q through
from Q to P through the
the light bulb
light bulb
from Q to P through
from P to Q through the
the light bulb
light bulb
C
D
28
Which of the following can increase the maximum voltage measured by the CRO?
(1)
Increase B0 while keeping f unchanged.
(2)
Increase f while keeping B0 unchanged.
(3)
Use a coil with same number of turns but a larger area.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
14
*29 The following shows the schematic diagram for a high-voltage power transmission system.
I1
V1
a.c. input
a.c. output
Which of the following are the results of increasing the voltage during the transmission?
(1)
The current I1 through the transmission cable decreases.
(2)
The voltage V1 across the transmission cable increases.
(3)
The power V1I1 dissipated in the transmission cable decreases.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
*30 Device X is connected to a 220-V mains via a step-down transformer. The transformer has a
turns ratio of 10 : 1 and can be assumed to be ideal. If device X is ohmic and has a resistance of
5 , find the current drawn from the mains.
A
0.044 A
B
0.44 A
C
4.4 A
D
44 A
*31  particles are electrons flying at extremely high speeds. Which of the following explains how
the electrons gain kinetic energy in a  decay?
A
Electric potential energy is converted into kinetic energy.
B
Gravitational potential energy is converted into kinetic energy.
C
Chemical energy is converted into kinetic energy.
D
Mass is converted into kinetic energy.
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
15
*32 A beam of charged particles is emitted from a source S. When the beam enters a uniform
magnetic field, it splits into two as shown in the following figure.
Y
S
X
Which of the following statements MUST BE correct?
33
A
The particles arriving at Y have higher speeds than the ones arriving at X.
B
The particles arriving at Y have larger masses than the ones arriving at X.
C
The particles arriving at Y have smaller amount of charge than the ones arriving at X.
D
None of the above
A photographic film is wrapped in black paper and placed in a dark drawer. Some powder
containing radionuclides is spread on the paper. After a few hours, the film is blackened. It is
known that all the radiations emitted by the powder can be deflected by a magnetic field.
powder containing
radionuclides
photographic film
wrapped in black paper
Which of the following statemetns MUST BE INCORRECT?
A
The powder emits  radiation.
B
The powder emits  radiation.
C
The powder emits  radiation.
D
The powder does not emit X-rays.
END OF SECTION A
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
16
List of data, formulae and relationships
Data
molar gas constant
R = 8.31 J mol1 K1
Avogadro constant
NA = 6.02  1023 mol1
acceleration due to gravity
g = 9.81 m s2 (close to the Earth)
universal gravitational constant
G = 6.67  1011 N m2 kg2
speed of light in vacuum
c = 3.00  108 m s1
charge of electron
e = 1.60  1019 C
electron rest mass
me = 9.11  1031 kg
permittivity of free space
0 = 8.85  1012 C2 N1 m2
permeability of free space
0 = 4  107 H m1
atomic mass unit
u = 1.661  1027 kg
(1 u is equivalent to 931 MeV)
astronomical unit
AU = 1.50  1011 m
light year
ly = 9.46  1015 m
16
parsec
pc = 3.09  10 m = 3.26 ly = 206 265 AU
Stefan constant
 = 5.67  108 W m2 K4
Planck constant
h = 6.63  1034 J s
Rectilinear motion
For uniformly accelerated motion:
v
=
s
v
=
2
=
u + at
1
ut + at 2
2
u2 + 2as
Mathematics
Equation of a straight line
y = mx + c
Arc length
= r
Surface area of cylinder
= 2rh + 2r2
Volume of cylinder
= r2h
Surface area of sphere
= 4r2
Volume of sphere
4
= πr 3
3
For small angles, sin   tan    (in radians)
Astronomy and Space Science
Energy and Use of Energy
GMm
U =
r
P = AT4
f v λ
 
f 0 c λ0
gravitational potential energy
E
Stefan’s law
A(TH  TC )
Q
=
d
t
Doppler effect
U=

A
illuminance

d
thermal transmittance U-value
1
Av 3
2
Medical Physics
P=
Atomic World
1
2
me vmax = hf   Einstein’s photoelectric equation
2
4
1 
13 .6
 me 

En =  2  2e 2  =  2 eV
n
n 
 8h  0 

energy level equation for hydrogen
atom
h
h
= =
de Broglie formula
p mv
1.22 λ

Rayleigh criterion (resolving power)
d
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
1.22 λ
d
1
power =
f

L = 10 log
rate of energy transfer by conduction
I
I0
maximum power by wind turbine
Rayleigh criterion (resolving power)
power of a lens
intensity level (dB)
Z = c
acoustic impedance
2
I
( Z  Z1 )
= r = 2
intensity reflection coefficient
I 0 ( Z 2  Z1 ) 2
I  I 0e x
17
transmitted intensity through a
medium
Q1Q 2
A1.
E = mcT
energy transfer during
heating and cooling
D1.
F=
A2.
E = lm
energy transfer during
change of state
D2.
E=
A3.
pV = nRT
equation of state for an
ideal gas
D3.
E=
A4.
pV =
1
Nmc 2
3
kinetic theory equation
D4.
R=
A5.
EK =
3RT
2N A
molecular kinetic energy
D5.
R = R1 + R2
D6.
v  p
=
t  t
4 π 0 r 2
Q
Coulomb’s law
4π 0 r 2
electric field strength due to a
point charge
V
d
electric field between parallel
plates (numerically)
l
resistance and resistivity
A
1
1
1
=
+
R R1 R 2
resistors in series
resistors in parallel
force
D7.
P = IV = I2R
power in a circuit
moment = F  d
moment of a force
D8.
F = BQv sin 
force on a moving charge in a
magnetic field
B3.
EP = mgh
gravitational potential
energy
D9.
F = BIl sin 
force on a current-carrying
conductor in a magnetic field
B4.
EK =
kinetic energy
D10.
B=
0 I
magnetic field due to a long
straight wire
B5.
P = Fv
mechanical power
D11.
B=
B6.
a=
centripetal acceleration
D12.
=N
B7.
F=
Newton’s law of
gravitation
D13.
Vs N s

Vp N p
ratio of secondary voltage to
primary voltage in a
transformer
C1.
y =
fringe width in
double-slit interference
E1.
N = N0ekt
law of radioactive decay
C2.
d sin  = n
diffraction grating
equation
E2.
t1 =
equation for a single
lens
E3.
A = kN
activity and the number of
undecayed nuclei
E4.
E = mc2
mass-energy relationship
B1.
F =m
B2.
C3.
1
mv 2
2
v2
= 2r
r
Gm1 m 2
r2
λD
a
1 1 1
 =
u v f
New Senior Secondary Physics at Work (Second Edition)
Mock Exam 2018 Paper 1A
 Oxford University Press 2017
2
18
2 πr
 0 NI
l

t
ln 2
k
magnetic field inside a long
solenoid
induced e.m.f.
half-life and decay constant
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