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8.3 Power and efficiency

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Question 50
F

A hoist receives 12 000 J12\,000\ \mathrm{J}12000 J of energy in 20 s. During this time, 3000 J is dissipated. What is the mean useful power output?

[1]
A

150 W150\ \mathrm{W}150 W

B

450 W450\ \mathrm{W}450 W

C

750 W750\ \mathrm{W}750 W

D

600 W600\ \mathrm{W}600 W

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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