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10.4 Mains electricity

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Question 19
F

A technician measures the usual mains voltage between three wires, X, Y and Z. Wire Z is known to be earth.

Wires testedPotential difference in V\mathrm{V}V
X and Z230
Y and Z0
X and Y230

Which identifies X and Y?

[1]
A

X is neutral; Y is live.

B

X is live; Y is neutral.

C

X is earth; Y is live.

D

X is neutral; Y is earth.

Markscheme

10.4 Mains electricity Questions

  1. GCSE
  2. /Physics
  3. /10.4 Mains electricity

81 exam-style questions on Edexcel GCSE Physics 10.4 Mains electricity, covering 10.4.1 Direct and alternating current, 10.4.2 Live, neutral and earth wires; safety, 10.4.3 Mains wire potential differences and dangers, and 10.4.4 Power ratings and energy use. Each one has a worked solution and a mark scheme showing where the marks go.

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