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1.7.1a Energy stores and energy transfers

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Question 98

An electric motor has a power input of 8.0 W. It wastes 2.0 W of power as thermal energy (heat) to the surroundings.

What is the efficiency of the motor?

A

25%25\%25%

B

60%60\%60%

C

75%75\%75%

D

80%80\%80%

Markscheme

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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