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2.3 Domestic uses and safety

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Question 24
H

A fault makes a current of 40 A flow in the earth wire of a metal-cased appliance. A person is touching the metal case. Which statement explains why almost all of this current flows in the earth wire?

[1]
A

The earth wire has a much lower resistance than the person has

B

The earth wire has a much higher resistance than the person has

C

The current in the earth wire changes direction 50 times each second

D

The metal case is at about 230 V and so is the person on the ground

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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