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10.4 Mains electricity

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Question 37
H

A room has a heater rated at 2.0 kW and four lamps each rated at 12 W. The heater runs for 20 min, and all four lamps run for 5.0 h.

What is the total electrical energy transferred to these appliances?

[1]
A

2.616 MJ2.616\ \mathrm{MJ}2.616 MJ

B

3.264 MJ3.264\ \mathrm{MJ}3.264 MJ

C

3.600 MJ3.600\ \mathrm{MJ}3.600 MJ

D

4.128 MJ4.128\ \mathrm{MJ}4.128 MJ

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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