Name：
Class：
syllabus reference
4.2.1 Electric charge
1
State that there are positive and negative charges
2
State that positive charges repel other positive charges, negative charges repel other negative charges,
but positive charges attract negative charges
3
Describe simple experiments to show the production of electrostatic charges by friction
and to show the detection of electrostatic charges
4
Explain that charging of solids by friction involves only a transfer of negative charge (electrons)
5
Describe an experiment to distinguish between electrical conductors and insulators
6
Recall and use a simple electron model to explain the difference between electrical conductors and
insulators and give typical examples
7
State that charge is measured in coulombs
1
A polythene rod repels an inflated balloon hanging from a nylon thread.
What charges must the rod and the balloon carry?
2
A
The rod and the balloon carry opposite charges.
B
The rod and the balloon carry like charges.
C
The rod is charged but the balloon is not.
D
The balloon is charged but the rod is not.
Two similar balloons hang side by side, on insulating threads, a short distance apart. They are
both rubbed with the same dry cloth and become charged.
Which diagram shows how the balloons hang after charging?
A
B
C
2
D
Name：
5
Class：
A polythene rod is rubbed with a cloth. The rod becomes positively charged because of the
movement of charged particles.
Which row gives the name of these charged particles, and the direction in which they move?
6
charged
particles
direction of
movement
A
electrons
from cloth to rod
B
electrons
from rod to cloth
C
protons
from cloth to rod
D
protons
from rod to cloth
A student holds a rod in his hand.
cloth
hand
rod
He rubs the rod with a cloth. The rod gains a positive charge.
Of which material could the rod be made, and which transfer of charge has happened?
material of rod
transfer of charge
A
metal
negative charge from rod to cloth
B
metal
positive charge from cloth to rod
C
plastic
negative charge from rod to cloth
D
plastic
positive charge from cloth to rod
4
Name：
9
Class：
A negatively charged cloud passes over a tall steel-framed building. A charge is induced on the
building by the cloud because charges flow through the building.
cloud
– – –
– – – –
tall building
earth
What charge is induced on the building and in which direction do the charge carriers move?
charge induced
on building
direction of charge flow
A
positive
from the building to earth
B
positive
from earth to the building
C
negative
from the building to earth
D
negative
from earth to the building
10 The diagram shows a positively charged conducting sphere and a wire connected to earth.
positively charged sphere
wire
earth
+
+
+
+
+
+
insulating support
What happens when the wire is touched onto the sphere?
A
Electrons flow from earth to the sphere.
B
Electrons flow from the sphere to earth.
C
Positive charges flow from earth to the sphere.
D
Positive charges flow from the sphere to earth.
6
Name：
11
Class：
(a) Two light, identical spheres, A and B, are suspended alongside each other on thin nylon
threads, as shown in Fig. 7.1.
nylon threads
A
B
Fig. 7.1
A is given a positive charge and B is given a negative charge.
On Fig. 7.1, draw how the threads and spheres might look after the spheres have been
charged.
[1]
(b) A cleaner is attempting to remove dust from some plastic-covered furniture, using a dry cloth.
Unfortunately, this seems to make the dust cling more firmly to the plastic covering.
(i)
Suggest why this happens.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
.......................................................................................................................................[3]
(ii)
Suggest why this would be less likely to happen if the cleaner used a cloth which was
very slightly damp.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
.......................................................................................................................................[2]
[Total: 6]
7
Name：
Class：
syllabus reference
4.2.1 Electric field
8
Describe an electric field as a region in which an electric charge experiences a force
9
State that the direction of an electric field at a point is the direction of the force on a positive charge at that point
10 Describe simple electric field patterns, including the direction of the field:
(a) around a point charge
(b) around a charged conducting sphere
(c) between two oppositely charged parallel conducting plates (end effects will not be examined)
13 What is an electric field?
A
a region around a wire carrying an electric current in which a compass needle experiences a
force
B
a region in which an electric charge experiences a force
C
a region in which an electric charge is attracted by the Earth’s gravity
D
a region through which electromagnetic radiation is passing
14 Which diagram represents the electric field due to a negatively-charged conducting sphere?
A
B
C
D
–
–
–
–
15 The diagram shows point X between two charged plates.
+
+
+
+
+
+
X
–
–
–
–
–
–
Which diagram shows the electric field pattern near point X?
A
B
C
10
D
Name：
Class：
19 (a) State what is meant by
(i)
an electric field,
...........................................................................................................................................
.......................................................................................................................................[1]
(ii)
the direction of an electric field at a point.
...........................................................................................................................................
.......................................................................................................................................[1]
(b) Fig. 11.1 shows a positively charged sphere.
Fig. 11.1
On Fig. 11.1, draw the pattern of the electric field in the region around the positively charged
sphere. Show the direction of the field with arrows.
[2]
(c) The charge on the sphere in (b) is + 2.0 × 10–5 C. A high resistance wire is now connected
between the sphere and earth. It takes 20 minutes for the sphere to become completely
discharged through the wire.
(i)
Suggest why there is a current in the wire between the sphere and earth.
.......................................................................................................................................[1]
(ii)
Calculate the average current in the wire between the sphere and earth.
average current = ...........................................................[2]
[Total: 7]
© UCLES 2016
0625/41/O/N/16
12
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syllabus reference
4.2.4 Resistance
V
I
1
Recall and use the equation for resistance R =
2
Describe an experiment to determine resistance using a voltmeter and an ammeter and do the appropriate calculations
3
State, qualitatively, the relationship of the resistance of a metallic wire to its length and to its cross-sectional area
4
Sketch and explain the current–voltage graphs for a resistor of constant resistance, a filament lamp and a diode
5
Recall and use the following relationship for a metallic electrical conductor:
(a) resistance is directly proportional to length
(b) resistance is inversely proportional to cross-sectional area
30 The table shows the voltage and current ratings for four light bulbs.
Which bulb has the greatest resistance when used normally?
voltage / V
current / A
A
2
0.5
B
3
0.2
C
6
D
12
12
1.0
31 An ammeter and an 18 Ω resistor are connected in series with a battery. The reading on the
ammeter is 0.50 A.
A
18 Ω
What is the electromotive force (e.m.f.) of the battery?
A
9.0 N
B
9.0 V
C
36 N
D
36 V