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2.3 Domestic uses and safety

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Question 16
F

A metal-cased appliance is connected to the mains by a cable that has no earth wire. Why is this dangerous?

[1]
A

If the live wire touches the case, the case becomes live at about 230 V

B

If the live wire touches the case, the current in the case falls to zero

C

The neutral wire will then carry the alternating potential difference

D

The metal case will always be at a potential difference of about 230 V

Markscheme

2.3 Domestic uses and safety Questions

  1. GCSE
  2. /Physics
  3. /2.3 Domestic uses and safety

40 exam-style questions on AQA GCSE Physics 2.3 Domestic uses and safety, covering 2.3.1 Direct and alternating potential difference and 2.3.2 Mains electricity. Each one has a worked solution and a mark scheme showing where the marks go.

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