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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers

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, 2008 7J multiple-choice main test: answers