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2.3 Domestic uses and safety

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Question 21
H

Which statement explains why the metal case of a correctly earthed appliance stays at 0 V?

[1]
A

The case is joined to the neutral wire, which is at 0 V

B

The case is made of metal, so it cannot hold a potential difference

C

The case is joined to the live wire only when there is a fault

D

The case is joined by the earth wire to earth, which is at 0 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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