12650981
Description
Quiz by Jeffrey Piggott, updated more than 1 year ago
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Created by Jeffrey Piggott
over 6 years ago
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Question 1
Question
Which of these statements is true?
Answer
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A) Plastic is a conductor because it lets electricity flow through it.
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B) Plastic is an insulator because it lets electricity flow through it.
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C) Metals are conductors because they let electricity flow through them.
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D) Metals are insulators because they let electricity flow through them.
Question 2
Answer
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A) a cell and a bulb
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B) a cell and a switch
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C) a bulb and a switch
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D a switch and a motor
Question 3
Question
Which instrument would you use to measure electric current?
Answer
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A) an ammeter
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B) a cell
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C) a motor
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D) a voltmeter
Question 4
Answer
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A) It would be biggest at X and smallest at Z. .
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B) It would be biggest at Z and smallest at X
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C) There would be no current at Y.
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D) It would be the same at all three places.
Question 5
Question
You can make the current in a circuit smaller by:
Answer
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A) putting a switch in the circuit.
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B) putting more bulbs in the circuit.
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C) taking some bulbs out of the circuit.
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D) putting more cells in the circuit.
Question 6
Question
" Resistance" is a way of saying:
Answer
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A) how much electricity is flowing.
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B) how hard it is for electricity to flow.
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C) how many cells are in a circuit.
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D) how many switches are in a circuit.
Question 7
Question
Electricity is:
Answer
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A) a source of energy.
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B) a kind of liquid inside the wires.
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C) tiny particles called electrons flowing through the wires.
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D) tiny particles called atoms flowing through the wires.
Question 8
Question
A long wire:
Answer
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A) has a smaller resistance than a short wire.
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B) has the same resistance as a short wire.
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C) has a bigger resistance than a short wire.
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D) does not have resistance.
Question 9
Answer
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A) X and Y only
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B) X and Z only
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C) Y and Z only
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D) all of them
Question 10
Question
Which switches must be pressed to make bulb X come on?
Answer
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A) 1 and 2 only
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B) 1 and 3 only
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C) 2 and 3 only
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D) all three of them
Question 11
Question
Parallel circuits are used for house lights:
Answer
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A) so they can all be switched on and off together.
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B) so you know when one breaks, because all the others go off
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C) so they use a bigger current.
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D) so they can all be switched on and off separately.
Question 12
Question
Which of the statements about this circuit can not be true?
Answer
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A) The currents at Q and R add up to give the current at S.
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B) The current is the same at P and S.
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C) The current is the same at Q and R.
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D) The current is the same at P and Q
Question 13
Question
When electricity flows through wires:
Answer
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A) they melt.
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B) they get cold.
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C) they get hot.
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D) nothing changes.
Question 14
Question
A fuse is:
Answer
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A) a metal strip that bends when it is hot
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B) a piece of wire that melts when it gets too hot.
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C) a piece of plastic that does not let electricity through.
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D) the part of a plug that sticks into a socket.
Question 15
Question
An electric heater has a current of 10 A flowing through it.
Which fuse should be used?
Answer
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A) 3 A
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B) 5 A
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C) 13 A
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D) 30 A
Question 16
Question
A fuse is used to:
Answer
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A) heat things.
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B) make things move.
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C) control the temperature of something.
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D) stop electricity flowing if something is wrong.
Question 17
Question
If you touch electrical equipment with wet hands:
Answer
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A) you might damage the equipment.
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B) you could get an electrical shock
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C) you might get your hands dirty.
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D) you might make the equipment dirty.
Question 18
Question
What happens if a large electrical current flows through your body?
Answer
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A) Your heart could stop working.
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B) Your eyeballs could explode.
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C) Nothing at all.
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D) It will improve your circulation.
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