11 markeasy
What is the unit of electromotive force?
Choose your answer
Joule
Volt
Ampere
Watt
Physics
Electrical Quantities — Multiple-Choice Questions (Cambridge International IGCSE Physics): Exam Questions
Exam code:062540 questions · 40 marks · ≈ 40 min
21 markeasy
The diagram shows two light, silver-coated balls labelled X and Y hanging from threads near to each other.
Which line identifies the possible charges on X and Y?
| X | Y | |
|---|---|---|
| A | neutral | neutral |
| B | negative | negative |
| C | negative | positive |
| D | positive | negative |
Choose your answer
31 markeasy
Extended tier only
What is the correct unit of charge?
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Ampere
Coulomb
Newton
Volt
41 markeasy
Which pair of quantities have the same units?
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Current and potential difference
Current and resistance
Electromotive force and potential difference
Electromotive force and resistance
51 markeasy
Which line correctly states the equation for electrical energy?
Choose your answer
61 markeasy
A large battery is labelled with various items of information about the battery.
| 12 V | 30 kg | 216 kJ | 680 A |
|---|
One of these items of information is the electromotive force (e.m.f.) of the battery.
What is the e.m.f. of the battery?
Choose your answer
12 V
30 kg
216 kJ
680 A
71 markeasy
Extended Tier Only
Which unit is equivalent to a volt (V)?
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A/Ω
J/C
J/s
W/C
81 markeasy
Which particles move to cause a current in a copper wire?
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copper atoms
electrons from the copper atoms
protons from the copper nuclei
neutrons from the copper nuclei
91 markeasy
A wire has a uniform circular cross-sectional area.
Which statement is correct?
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The resistance of the wire is directly proportional to its cross-sectional area and inversely proportional to its diameter.
The resistance of the wire is directly proportional to its cross-sectional area and inversely proportional to its length.
The resistance of the wire is directly proportional to its length and inversely proportional to its cross-sectional area.
The resistance of the wire is directly proportional to its length and inversely proportional to its diameter.
101 markeasy
The diagrams show the voltage–time graphs for two electrical power supplies, X and Y.
Which row correctly identifies the type of current provided by each supply?
| supply X | supply Y | |
|---|---|---|
| A | alternating current (a.c.) | direct current (d.c.) |
| B | alternating current (a.c.) | alternating current (a.c.) |
| C | direct current (d.c.) | direct current (d.c.) |
| D | direct current (d.c.) | alternating current (a.c.) |
Choose your answer
111 markeasy
The electromotive force (e.m.f.) of a battery is
Choose your answer
the charge that flows through the battery per unit time
the energy transferred per unit charge in driving charge around a complete circuit
the force that pushes electrons through the circuit
the potential difference across the terminals of the battery when no current flows
121 markmedium
A PVC (plastic) rod is rubbed with a nylon cloth. This process causes electrons to be transferred between the rod and the cloth, causing both objects to become charged.
Which row gives the correct nature of the charges on both the cloth and the rod, and the effect the objects have on each other after becoming charged?
| Charges on rod and cloth | Effect | |
|---|---|---|
| A | the same | repel |
| B | the same | attract |
| C | opposite | repel |
| D | opposite | attract |
Choose your answer
131 markmedium
A student wants to charge up some rods by rubbing them with a cloth made from a suitable material.
He has a number of rods to choose from: a copper rod, a PVC rod, an aluminium rod and a glass rod.
Which two of the rods would hold a charge when rubbed with an appropriate cloth?
Choose your answer
Aluminium and PVC
Glass and copper
Aluminium and copper
Glass and PVC
141 markmedium
Extended tier only
A student considers how changing the diameter and length of a wire affects its resistance.
Which row shows the changes that could be made to the length and diameter of the wire to decrease its resistance?
| Change to length | Change to diameter | |
|---|---|---|
| A | increase | increase |
| B | increase | decrease |
| C | decrease | increase |
| D | decrease | decrease |
Choose your answer
151 markmedium
A student rubs an acetate rod with a cloth, giving it a negative charge. She then holds it near an earthed, conducting sphere as shown in the diagrams below.
Which diagram shows the correct distribution of charges on the conducting sphere?
Choose your answer
161 markmedium
Extended tier only
A student has four copper wires, of different dimensions.
Which of the following wires has the largest resistance?
| Length of wire / cm | Diameter of wire / mm | |
|---|---|---|
| A | 100 | 0.2 |
| B | 300 | 0.1 |
| C | 50 | 0.4 |
| D | 30 | 0.5 |
Choose your answer
171 markmedium
A plastic rod is rubbed with a cloth. The rod becomes positively charged.
What happens to the plastic rod and what is the charge on the cloth?
| plastic rod | charge on cloth | |
|---|---|---|
| A | gains electrons | negative |
| B | gains electrons | positive |
| C | loses electrons | negative |
| D | loses electrons | positive |
Choose your answer
181 markmedium
The electromotive force (e.m.f.) of a mobile phone battery is 3.7 V.
What does this mean?
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3.7 J is the maximum energy the battery can provide in 1.0 s.
3.7 J is the total energy the battery can provide before it has to be recharged.
3.7 J of energy is provided by the battery to drive a charge of 1.0 C around a complete circuit.
3.7 J of energy is provided by the battery to drive a current of 1.0 A around a complete circuit.
191 markmedium
A water heater is connected to a 230 V supply and there is a current of 26 A in the heater.
It takes 20 minutes to heat the water to the required temperature.
How much energy is supplied by the heater?
Choose your answer
6.0 103 J
1.0 104 J
1.2 105 J
7.2 106 J
201 markmedium
The diagram shows a charged plastic rod and an uncharged metal sphere. The metal sphere is suspended by an insulating thread.
The plastic rod is then moved close to the metal sphere.
Which row is correct?
| observation | the overall state of the metal sphere | |
|---|---|---|
| A | The rod attracts the sphere. | charged |
| B | The rod attracts the sphere. | uncharged |
| C | The rod repels the sphere. | charged |
| D | The rod repels the sphere. | uncharged |
Choose your answer
211 markmedium
The circuit shown is being used to measure the resistance of resistor Z.
What is the correct combination of meters to determine the resistance of resistor Z?
| meter X | meter Y | |
|---|---|---|
| A | ammeter | ammeter |
| B | ammeter | voltmeter |
| C | voltmeter | ammeter |
| D | voltmeter | voltmeter |
Choose your answer
221 markmedium
A plastic rod is brought near to a small plastic sphere suspended from a stand. The sphere is repelled by the rod.
Why is this?
Choose your answer
The rod and the sphere have like charges.
The rod and the sphere have unlike charges.
The rod is charged and the sphere is uncharged.
The rod is uncharged and the sphere is charged.
231 markmedium
A resistor converts 360 J of energy when there is a current of 3.0 A in it. The potential difference across the resistor is 6.0 V.
For how long is there this current in the resistor?
Choose your answer
0.05 s
20 s
180 s
720 s
241 markmedium
A plastic rod is rubbed with a cloth.
The rod and the cloth both become charged as electrons move between them.
The rod becomes negatively charged.
Which diagram shows how the rod becomes negatively charged and shows the final charge on the cloth?
Choose your answer
251 markmedium
Four students draw a circuit diagram of the apparatus used to measure the resistance of resistor R.
Which circuit is correct?
Choose your answer
261 markmedium
The diagram shows the current–voltage graph for a metal wire.
What can be deduced from the graph?
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As voltage increases, the temperature of the wire increases.
As voltage increases, the temperature of the wire decreases.
As voltage increases, the resistance of the wire increases.
As voltage increases, the resistance of the wire remains constant.
271 markmedium
A battery is connected to a circuit. It is switched on for 1.0 minute. During that time, there is a current of 0.40 A in the circuit and the battery supplies a total of 48 J of energy.
Which row gives the charge that passes and the electromotive force (e.m.f.) of the battery?
| charge that passes in 1.0 minute / C | e.m.f. of the battery / V | |
|---|---|---|
| A | 0.40 | 2.0 |
| B | 0.40 | 120 |
| C | 24 | 2.0 |
| D | 24 | 120 |
Choose your answer
281 markmedium
A student rubs a plastic rod with a cloth. The rod becomes negatively charged.
Which statement about the rod is correct?
Choose your answer
It gains electrons from the cloth and is attracted by a positively charged object.
It gains electrons from the cloth and is repelled by a positively charged object.
It loses electrons to the cloth and is attracted by a negatively charged object.
It loses electrons to the cloth and is repelled by a negatively charged object.
291 markmedium
A plastic rod is rubbed with a cloth. The rod becomes negatively charged.
What has happened during the charging process?
Choose your answer
Protons have been transferred from the rod to the cloth.
Electrons have been transferred from the rod to the cloth.
Protons have been transferred from the cloth to the rod.
Electrons have been transferred from the cloth to the rod.
301 markmedium
A current of 0.50 A flows through a lamp for 4.0 minutes.
What is the charge that flows through the lamp?
Choose your answer
2.0 C
8.0 C
60 C
120 C
311 markhard
Extended tier only
What is the definition of an electric field?
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A region in space in which a mass experiences a force due to the Earth’s mass.
A region in space through which electromagnetic radiation is passing.
A region in space in which a compass needle experiences a force.
A region in space in which an electric charge experiences a force.
321 markhard
Extended tier only
Four current-voltage graphs are given below.
Which graph shows an ohmic resistor and which shows a filament lamp?
| Filament lamp | Ohmic resistor | |
|---|---|---|
| A | Q | S |
| B | R | Q |
| C | P | Q |
| D | Q | R |
Choose your answer
331 markhard
Extended tier only
Which diagram shows the correct electric field pattern between two oppositely charged parallel plates?
Choose your answer
341 markhard
Extended tier only
Which row in the table gives the correct units for charge and e.m.f.?
| Charge | EMF | |
|---|---|---|
| A | Q | E |
| B | C | V |
| C | A | J |
| D | J | ᘯ |
Choose your answer
351 markhard
Extended tier only
A student sets up a circuit as shown in the diagram.
A charge of 4.9 C flows through the resistor in 0.7 s.
Which row shows the correct current, direction of electron flow and direction of conventional current through the resistor?
| current / A | direction of electron flow | direction of conventional current | |
|---|---|---|---|
| A | 7.00 | Left to right | Right to left |
| B | 3.43 | Left to right | Right to left |
| C | 7.00 | Right to left | Right to left |
| D | 3.43 | Right to left | Right to left |
Choose your answer
361 markhard
A student connects a 6 V power supply to a 3 Ω resistor. The resistor is left connected to the power supply for 1 minute.
How much power is dissipated by the resistor?
Choose your answer
2 W
12 W
720 J
18 W
371 markhard
A 3.0 Ω resistor is connected to a 15 V power supply as shown in the diagram. The ammeter reads 5 A throughout the experiment.
How much energy is dissipated as heat by the resistor in 2 minutes?
Choose your answer
9.0 kJ
150 J
600 J
5.0 kJ
381 markhard
A 2.0 Ω resistor is connected to meter X and meter Y as shown in the diagram.
Which row in the table shows possible values for the two meters?
| X | Y | |
|---|---|---|
| A | 4.0 | 8.0 |
| B | 2.0 | 2.0 |
| C | 4.0 | 2.0 |
| D | 1.0 | 1.0 |
Choose your answer
391 markhard
A student wants to measure the power dissipated by a 10 kΩ resistor.
What equipment should the student use to determine the power dissipated?
Choose your answer
A voltmeter and an ammeter
A voltmeter, an ammeter and a stopwatch
A voltmeter only
An ammeter and a stopwatch
401 markhard
An electric heater with a power rating of is switched on for . The cost of of electricity is .
What is the total cost of using the heater?
Choose your answer