11 markeasy
What is the unit of electromotive force?
Choose your answer
Joule
Volt
Ampere
Watt
Co-ordinated Sciences (Double Award) — Physics
Electrical Quantities — Multiple-Choice Questions (Cambridge International IGCSE Science): Exam Questions
Exam code:097321 questions · 21 marks · ≈ 21 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?
Choose your answer
Ampere
Coulomb
Newton
Volt
41 markeasy
Which pair of quantities have the same units?
Choose your answer
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 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
71 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
81 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
91 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
101 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
111 markmedium
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
121 markmedium
The diagram shows a circuit containing a battery, three switches, , , and , and two lamps and .
A student wants to light lamp only.
Which switches must be closed?
Choose your answer
only
and only
and only
, and
131 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
141 markhard
Extended tier only
What is the definition of an electric field?
Choose your answer
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.
151 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
161 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
171 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
181 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
191 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
201 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
211 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