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3.2 Dissipation and efficiency

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Question 39
H

A device dissipates 150 J while operating at an efficiency of 70%.

What is the useful energy output?

[1]
A

105 J105\ \mathrm{J}105 J

B

214 J214\ \mathrm{J}214 J

C

500 J500\ \mathrm{J}500 J

D

350 J350\ \mathrm{J}350 J

Markscheme

3.2 Dissipation and efficiency Questions

  1. GCSE
  2. /Physics
  3. /3.2 Dissipation and efficiency

100 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency, covering 3.2.1 Dissipation of energy, 3.2.2 Reducing unwanted energy transfers, 3.2.3 Efficiency, and 3.2.4 Increasing efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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