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8.3 Power and efficiency

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Question 56
H

A motor receives 600 W. The motor has an efficiency of 0.80 and drives a gearbox. The gearbox transfers 75% of the energy it receives to a load. What is the useful power transferred to the load?

[1]
A

480 W480\ \mathrm{W}480 W

B

450 W450\ \mathrm{W}450 W

C

360 W360\ \mathrm{W}360 W

D

120 W120\ \mathrm{W}120 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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