7J Electrical circuits Multiple-choice main test

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1 For each question, circle the correct answer. 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 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 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 Essentials Science Cambridge University Press 2003, 2006,

2 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 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 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 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 Essentials Science Cambridge University Press 2003, 2006,

3 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 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 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 Essentials Science Cambridge University Press 2003, 2006,

4 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 Question 12 Choose the position in the circuit A B C or D where the current will be 3.0 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 Essentials Science Cambridge University Press 2003, 2006,

5 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 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. 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 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 Essentials Science Cambridge University Press 2003, 2006,

6 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 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 Question 20 Alessandro Volta invented the first... A) ammeter B) bulb C) battery D) fuse Cambridge Essentials Science Cambridge University Press 2003, 2006,

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