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AQA GCSE Physics - Electricity - End of Topic Quiz

Total questions: 40

Worksheet time: 3hrs 2mins

Name
Class
Date
1.

What is the power of a 3V light bulb with 20 A running through it?

a)

0.15 W

b)

0.45 W

c)

60 W

d)

6.67 W

2.

A light circuit is operating at 75 Volts. What is the current if the resistance is 5 Ohms?

a)

375 Amps

b)

50 Amps

c)

15 Amps

d)

0.07 Amps

3.

What is the best definition for potential difference?

a)

the potential energy per electron.

b)

the potential energy per unit of charge.

c)

the kinetic energy per unit of charge.

d)

the energy carried by an electron.

4.

A student used some everyday items to investigate static electricity.

Figure 1 shows a flexible plastic strip being rubbed with a cloth. Rubbing the plastic strip with the cloth causes the strip to become negatively charged because ____________________ move from the cloth onto the plastic strip.

a)

electrons

b)

protons

c)

neutrons

d)

ions

5.

The graph below shows how the current through a filament lamp changes after the lamp is switched on.


The normal current through the filament lamp is 1.5 A.

For how many seconds is the current through the filament lamp greater than 1.5 A?

a)

0.01 s

b)

0.08 s

c)

0.09 s

d)

0.14 s

6.

LED lamps are much more efficient than filament lamps.

What does this statement mean?

a)

LED lamps have a similar power output to filament lamps.

b)

LED lamps waste a smaller proportion of the input energy than filament lamps.

c)

LED lamps have a higher power input than filament lamps.

d)

LED lamps waste a larger proportion of the input energy than filament lamps.

7.

The diagram shows a temperature sensing circuit used to control a heating system in a house.

What quantity does the ammeter measure?

a)

Current

b)

Potential difference

c)

Resistance

d)

Power

8.

The diagram shows a temperature sensing circuit used to control a heating system in a house.

The current in the circuit is 3.5 mA when the potential difference across the thermistor is 4.2 V

Calculate the resistance of the thermistor in Ohms.

a)

1200

b)

1.2

c)

14.7

d)

0.0147

9.

Figure 1 shows the inside of a battery pack designed to hold three identical 1.5 V cells.

Which one of the arrangements shown in Figure 2 would give a 4.5 V output across the battery pack terminals T?

a)
b)
c)
d)
10.

The battery in the drone can store 97.5 kJ of energy.

When the drone is hovering, the power output of the battery is 65.0 W

Calculate the time in seconds for which the drone can hover.

a)

1 500

b)

5 850

c)

1.5

d)

6 337 500

11.

The drone battery powers 4 motors in the drone.

Each motor has a resistance of 1.60 Ω when the power input to each motor is 19.6 W

The 4 motors are connected in parallel with the battery.

Calculate the current through the battery in amps.

a)

3.5 A

b)

14 A

c)

12.25 A

d)

49 A

12.

A student set up the electrical circuit shown in the figure.

The ammeter displays a reading of 0.10 A.

Calculate the potential difference (in Volts) across the 45 Ω resistor.

a)

450 V

b)

4.5 V

c)

0.002 V

d)

0.45 V

13.

What is power?

a)

The number of repetitions of squats a body-builder can perform

b)

The number of cylinders in a car

c)

The rate at which energy is absorbed

d)

The rate at which energy is transferred

14.

Calculate the power of an appliance that uses 1000 joules of energy in 5 seconds.

a)

5 000 W

b)

200 W

c)

25 000 W

d)

0.005 W

15.

Power, potential difference and current are correctly related by which equation?

a)

 P=V×IP=V\times I  

b)

 P=I2×VP=I^2\times V  

c)

 P=VIP=\frac{V}{I}  

d)

 P=VI2P=\frac{V}{I^2}  

16.

Which equation correctly shows the relationship between energy transferred, voltage and charge?

a)

E=Q×VE=Q\times V

b)

E=12QV2E=\frac{1}{2}QV^2

c)

E=VQE=\frac{V}{Q}

d)

E=QVE=\frac{Q}{V}

17.

This is the symbol for a...

a)

Light Dependent Resistor

b)

Light Emitting Diode

c)

Thermistor

d)

Cell

18.

This is the symbol for a...

a)

Light Emitting Diode

b)

Light Dependent Resistor

c)

Fuse

d)

Cell

19.

This is the symbol for a...

a)

Thermistor

b)

Fixed Resistor

c)

Variable Resistor

d)

Fuse

20.

In a conductor, an electric current is the flow of...

a)

water

b)

electrons

c)

protons

d)

neutrons

21.
What is the voltage of mains electricity in the UK National Grid?
a)
120 V
b)
220 V
c)
230 V
d)
None of these
22.
What is the frequency of alternating current in the UK National Grid?
a)
60 Hz
b)
50 Hz
c)
230 V
d)
120 V
23.
There are two 10 ohm resistors connected in series, the total resistance is...
a)
10 ohms
b)
20 ohms
c)
15 ohms
d)
100 ohms
24.

Which wire is connected to a fuse in a UK plug?

a)

Live

b)

Neutral

c)

Earth

d)

Positive

25.

What quantities are changed in a step-up transformer?

(select two)

a)

Voltage increases

b)

Voltage decreases

c)

Current increases

d)

Current decreases

26.

Step-up transformers...

a)

improve the efficiency of the national grid

b)

reduce the voltage to a safe level for the home

c)

increase the current to reduce energy loss

d)

decrease the resistance of the power cables

27.

Which colour is live?

a)

Yellow and Green

b)

Blue

c)

Brown

d)

None of them

28.

How long does it take for a 1.25 kW hairdryer to transfer 175,000 J of energy?

a)

218 750 s

b)

140 000 s

c)

140 s

d)

14 000 s

29.

A step-down transformer is used to decrease the potential difference of the electricity carried by transmission lines before it is distributed to homes and workplaces.

Why is the potential difference decreased?

a)

To reduce the potential difference to a safer level for home use.

b)

To reduce the current so less energy is lost through heating of wires.

c)

To speed up the transmission of electricity

d)

To reduce the the number of pylons and cables needed.

30.

Calculate the power of a TV that is connected to the mains electricity supply and is supplied with a current of 0.8 A.

a)

0.003 W

b)

184 W

c)

287.5 W

d)

147.2 W

31.

A resistor dissipates 90 W of energy when a current of 3 A passes through it. Calculate the resistance of the resistor.

Show Answers

a)

2700 Ω

b)

30 Ω

c)

10 Ω

d)

810 Ω

32.

A certain wind turbine has a maximum power output of 2,500,000 W.

Calculate the energy output in MJ (megajoules) of the turbine if it operates continuously at its maximum power for 5 hours.

a)

45 000 MJ

b)

12.5 MJ

c)

4 500 MJ

d)

750 MJ

33.

Electricity is transmitted around the country the National Grid. The transmission lines dissipate 1 % of the power they are supplied with.

Calculate the power dissipated by a 80 kΩ transmission line carrying a current of 5 A.

a)

20 kW

b)

2 000 kW

c)

2 000 W

d)

20 W

34.

A 600 W travel hairdryer requires a current of 10 A to work.

How many 12 V cells would be needed to supply enough current for the hairdryer?

a)

5

b)

500

c)

60

d)

25

35.

The heating element in a coffee machine has a resistance of 25 Ω when supplied with a current of 10 A.

What is the power rating of the coffee machine?

a)

2 500 W

b)

250 W

c)

6 250 W

d)

2.5 W

36.

How much energy 3.6 kW tumble dryer transfer when it is used for 10 minutes?

a)

2160 kJ

b)

36 kJ

c)

36 J

d)

21.6 kJ

37.

A 3-ohm resistor and a 6-ohm resistor are connected in parallel across a 9-volt battery. Which statement best compares the potential difference across each resistor?

a)

The potential difference across the 6-ohm resistor is four times as great as the potential difference across the 3-ohm resistor.

b)

The potential difference across the 6-ohm resistor is half as great as the potential difference across the 3-ohm resistor.

c)

The potential difference across the 6-ohm resistor is the same as the potential difference across the 3-ohm resistor.

d)

The potential difference across the 6-ohm resistor is twice as great as the potential difference across the 3-ohm resistor.

38.

The diagram shows two resistors connected in a circuit.


What could be the combined resistance of this arrangement of resistors?

a)

4.0Ω

b)

6.0Ω

c)

9.0Ω

d)

18Ω

39.

This is a graph for which component?

a)

LDR

b)

Thermistor

c)

Diode

d)

Resistor

e)

Filament lamp

40.

This is a graph for which component?

a)

LDR

b)

Thermistor

c)

Diode

d)

Resistor

e)

Filament lamp

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