Electricity MCQ Test 2 Answer Guide

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1 pt(s).		 The diagram below shows a game where players try to move a metal needle through three metal paper clips without letting the needle touch the clips. A bulb lights when the needle touches a paper clip, signaling that the player has lost. Why does the bulb light when the needle touches a paper clip?
A. Convection currents are started
B. Vibrations set up wavelike disturbances
correct answer choice answer choice you marked C. A circuit is completed
D. A state change occurs
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1 pt(s).		 Look at the circuit below. Both bulbs are identical. Bulb X would be
A. dimmer than bulb Y
B. brighter than bulb Y
correct answer choice answer choice you marked C. just as bright as bulb Y
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1 pt(s).		 Look at the circuit below. Both bulbs are identical. Bulb X is
A. dimmer than bulb Y
B. brighter than bulb Y
correct answer choice answer choice you marked C. just as bright as bulb Y
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1 pt(s).		 Two circuits were set up as shown below. All the bulbs in both circuits were identical. Comparing circuits 1 and 2, bulb X is
A. dimmer than in circuit 1
B. brighter than in circuit 1
correct answer choice answer choice you marked C. the same as in circuit 1
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1 pt(s).		 Look at the circuit diagram below. The current at position S is 4A. The current at position T is 2A. What is the current at position P?
A. 0A
B. 2A
correct answer choice answer choice you marked C. 4A
D. 6A
E. 8A
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1 pt(s).		 Look at the circuit diagram below. The current at position S is 4A. The current at position T is 2A. What is the current at position R?
A. 0A
correct answer choice answer choice you marked B. 2A
C. 4A
D. 6A
E. 8A
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1 pt(s).		 Look at the circuit diagram below. The current at position S is 4A. The current at position T is 2A. What is the current at position Q?
A. 0A
correct answer choice answer choice you marked B. 2A
C. 4A
D. 6A
E. 8A
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1 pt(s).		 Look at the circuit diagram below. For bulb M to light up,
A. only switch P must be closed
correct answer choice answer choice you marked B. only switch Q must be closed
C. both switches must be closed
D. neither switch need be closed
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1 pt(s).		 Look at the circuit diagram below. For bulb N to light up,
A. only switch P must be closed
B. only switch Q must be closed
C. both switches must be closed
correct answer choice answer choice you marked D. neither switch need be closed
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1 pt(s).		 The lights in your home are wired
correct answer choice answer choice you marked A. in parallel, so that if one fails the remainder stay on
B. in series, so that if one fails the remainder stay on
C. in parallel, so that if one fails all the lights go off
D. in series, so that if one fails all the lights go off
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1 pt(s).		 In which of the following circuits does the voltmeter measure the voltage across bulb X?
A.
B.
C.
correct answer choice answer choice you marked D.
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1 pt(s).		 A circuit is set up as shown.
A. I only
B. II only
correct answer choice answer choice you marked C. III only
D. I and II only
E. I and III only
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1 pt(s).		 A circuit is set up as shown.
A. I only
B. II only
correct answer choice answer choice you marked C. I and II only
D. I and III only
E. I, II and III
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1 pt(s).		 A circuit is set up. The readings on ammeters A1, A2 and A3 are shown. (an ampere is the same as an amp, A) The reading on ammeter A4 is
A. 1 ampere
correct answer choice answer choice you marked B. 7 ampere
C. 10 ampere
D. 11 ampere
E. 14 ampere
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1 pt(s).		 A circuit is set up as shown.
A. A
B. B
correct answer choice answer choice you marked C. C
D. D
E. E

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