1. Year 7 multiple-choice main test: answers 7J Electrical circuits
7A multiple-choice extension test: answers
Year 7 multiple-choice main test: answers 7J Electrical circuits
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

2. A switch turns off a torch by... A) breaking the circuit
Question 1
A switch turns off a torch by...
A) breaking the circuit
B) making the circuit
C) shorting the circuit
D) turning a series circuit into a parallel circuit
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

3. In this circuit the bulb lights when... A) switch A only is closed
Question 2
In this circuit the bulb lights when...
A) switch A only is closed
B) switch B only is closed
C) switch A and switch B are closed
D) switch A and switch B are open
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

4. A) two batteries in parallel B) two batteries in series
Question 3
The diagram shows...
A) two batteries in parallel
B) two batteries in series
C) two cells in parallel
D) two cells in series
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

5. Electric current flows from...
Question 4
Electric current flows from...
A) the negative side of a battery around the circuit to the negative side
B) the negative side of a battery around the circuit to the positive side
C) the positive side of a battery around the circuit to the negative side
D) the positive side of a battery around the circuit to the positive side
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

6. Question 5
A cell can be used to produce an electric current. Inside a cell you would find...
A) chemicals
B) a motor
C) a pump
D) a variable resistor
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

7. Electric current is measured...
Question 6
Electric current is measured...
A) using an ammeter and in units of amperes
B) using an ammeter and in units of volts
C) using a voltmeter and in units of amperes
D) using a voltmeter and in units of volts
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

8. The circuit in which the ammeter is connected correctly is...
Question 7
The circuit in which the ammeter is connected correctly is...
A) circuit 1 only
B) circuits 1 and 3 only
C) circuits 2 and 3 only
D) circuit 3 only
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

9. The readings on ammeters X and Y will be... A) X = 0.10 A; Y = 0 A
Question 8
The readings on ammeters X and Y will be...
A) X = 0.10 A; Y = 0 A
B) X = 0.15 A; Y = 0.10 A
C) X = 0.20 A; Y = 0.20 A
D) X = 0.25 A; Y = 0.30 A
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

10. A bulb in a series circuit can be made dimmer by increasing...
Question 9
A bulb in a series circuit can be made dimmer by increasing...
A) the current in the circuit
B) the resistance of the circuit
C) the voltage of the battery
D) the voltage of the cell
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

11. Question 10
When three 1.5 V cells are connected as shown in this diagram, the total voltage is...
A) 0.5 V
B) 1.5 V
C) 3.0 V
D) 4.5 V
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

12. The two circuits that have two bulbs connected in series are...
Question 11
The two circuits that have two bulbs connected in series are...
A) 1 and 2 only
B) 1 and 4 only
C) 2 and 3 only
D) 2 and 4 only
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

13. Question 12
Choose the position in the circuit A B C or D where the current will be 3.0 A.
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

14. The current at X would be... A) 0.5 A B) 1.0 A C) 1.5 A D) 2.0 A
Question 13
The current at X would be...
A) 0.5 A
B) 1.0 A
C) 1.5 A
D) 2.0 A
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

15. The brightness of the bulbs in circuits 1 and 2 would be...
Question 14
The brightness of the bulbs in circuits 1 and 2 would be...
A) circuit 1 = bright; circuit 2 = bright
B) circuit 1 = bright; circuit 2 = dim
C) circuit 1 = dim; circuit 2 = bright
D) circuit 1 = dim; circuit 2 = dim
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

16. Choose the statement that does not describe
Question 15
Choose the statement that does not describe
a safety hazard when using electricity.
A) Plugging several appliances into the same socket.
B) Pulling a plug out by the lead.
C) Using mains appliances in the bathroom.
D) Using two kettles in the same kitchen.
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

17. A) breaking the circuit if the current is too big
Question 16
A fuse works by...
A) breaking the circuit if the current is too big
B) breaking the circuit if the resistance is too big
C) reducing the current flowing
D) reducing the resistance of the circuit
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

18. A) in the earth wire of a plug B) in the live wire of a plug
Question 17
Choose the position A B C or D in a plug where a fuse should be placed.
A) in the earth wire of a plug
B) in the live wire of a plug
C) in the neutral wire of a plug
D) none of these
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

19. Question 18
A device that could be used instead of a fuse to protect a circuit is...
A) an ammeter
B) a circuit breaker
C) a switch
D) a variable resistor
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

20. Luigi Galvani discovered that frogs’ legs contain...
Question 19
Luigi Galvani discovered that frogs’ legs contain...
A) nerves that carry electrical pulses
B) nerves that carry water
C) wires that carry electrical pulses
D) wires that carry water
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers

21. Alessandro Volta invented the first... A) ammeter B) bulb C) battery
Question 20
Alessandro Volta invented the first...
A) ammeter
B) bulb
C) battery
D) fuse
© Cambridge University Press 2003, 2006, J multiple-choice main test: answers