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1.7.1a Energy stores and energy transfers

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Question 171

Which statement about efficiency is correct?

A

Efficiency is measured in joules.

B

Efficiency is equal to the ratio of useful energy output to total energy input.

C

Efficiency can be greater than 100% in a closed system.

D

Efficiency is the rate at which energy is transferred.

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1.7.1a Energy stores and energy transfers Questions

  1. IGCSE
  2. /Physics
  3. /1.7.1a Energy stores and energy transfers

229 exam-style questions on CIE IGCSE Physics 1.7.1a Energy stores and energy transfers. Each one has a worked solution and a mark scheme showing where the marks go.

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