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10.4 Mains electricity

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Question 4
F

A student records the voltage across two supplies. Supply P stays at +6 V. Supply Q repeatedly changes from +6 V to -6 V and back.

Each supply is connected separately across a resistor. Which describes the current in the resistor?

[1]
A

P changes direction; Q changes direction.

B

P flows in one direction; Q changes direction.

C

P changes direction; Q flows in one direction.

D

P flows in one direction; Q flows in one direction.

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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