GCSE COMBINED SCIENCE: TRILOGY Higher Tier Physics Paper 1H

The plug is not wired correctly.
What should be done to connect the wires in the plug correctly?
[1 mark]
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box
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IB/M/Jun20/8464/P/1H
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outside the
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The correctly wired plug and cable connects a washing machine to the mains
electricity supply.
0
1
.
2
Give the potential difference and frequency of the mains electricity supply in the UK.
[2 marks]
The potential difference is
V
The frequency is
Hz
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1
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3
The washing machine is switched on.
What is the potential difference between the neutral wire and the earth wire?
[1 mark]
Potential difference =
V
0
1
.
4
The plug has a fuse.
Draw the circuit symbol for a fuse in the space below.

The washing machine has a metal case.
A fault causes the live wire to make an electrical connection with the metal case of the washing machine.
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1
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5
The earth wire is not connected to the metal case of the washing machine.
Explain why it would not be safe for a person to touch the metal case.

The earth wire is now connected to the metal case of the washing machine.
Explain why it would now be safe for a person to touch the metal case, even if the live wire touches the metal case.