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3.2 Dissipation and efficiency

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Question 45
H

Two pumps each transfer 120 kJ usefully in a test. Pump X has an efficiency of 0.80. Pump Y has an efficiency of 0.60.

What is the ratio of wasted energy from X to wasted energy from Y?

[1]
A

3:43:43:4

B

4:34:34:3

C

8:38:38:3

D

3:83:83:8

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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