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8.3 Power and efficiency

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Question 45
F

A motor transfers 2400 J usefully. Its efficiency is 0.80. How much energy is dissipated in unwanted transfers?

[1]
A

1920 J1920\ \mathrm{J}1920 J

B

480 J480\ \mathrm{J}480 J

C

600 J600\ \mathrm{J}600 J

D

3000 J3000\ \mathrm{J}3000 J

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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