Skip to content

Course home

Sign up

10.4 Mains electricity

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334353637
Question 36
H

A heater operating at 1.8 kW transfers 75% of its electrical input energy to water. The thermal energy store of the water increases by 324 kJ.

For how long does the heater operate?

[1]
A

135 s135\ \mathrm{s}135 s

B

180 s180\ \mathrm{s}180 s

C

240 s240\ \mathrm{s}240 s

D

432 s432\ \mathrm{s}432 s

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.

Question bank