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2.3 Domestic uses and safety

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Question 2
F

An electric heater has a metal case and is connected to the mains by a three-core cable. The live wire inside the heater has come loose and is touching the metal case.

Figure: An electric heater with a metal case, showing the live wire touching the case

image

a.

The heater is correctly earthed.

Explain how the earth wire keeps the person in the figure safe.

[3]
b.

Give one reason why the heater is unsafe to use if the earth wire is broken.

[1]
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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