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3.2 Dissipation and efficiency

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Question 50
H

A device has an efficiency of 40%. A modification is intended to increase its efficiency to 50% without changing the input energy.

By what percentage must the wasted energy decrease?

[1]
A

10.0%10.0\%10.0%

B

20.0%20.0\%20.0%

C

25.0%25.0\%25.0%

D

16.7%16.7\%16.7%

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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