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8.3 Power and efficiency

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Question 24

During one movement, a motorised theatre curtain receives 54 kJ of energy. It dissipates 18 kJ and has a mean useful power output of 1.2 kW. How long does the movement take?

[1]
A

15 s15\ \mathrm{s}15 s

B

30 s30\ \mathrm{s}30 s

C

45 s45\ \mathrm{s}45 s

D

60 s60\ \mathrm{s}60 s

Markscheme

8.3 Power and efficiency Questions

  1. GCSE
  2. /Physics
  3. /8.3 Power and efficiency

128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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