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1.2 Conservation and dissipation of energy

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Question 24
F

An electric motor lifts a load. The motor transfers 120 J of energy usefully and dissipates 280 J of energy. What is the efficiency of the motor?

[1]
A

0.15

B

0.23

C

0.30

D

0.43

Markscheme

1.2 Conservation and dissipation of energy Questions

  1. GCSE
  2. /Physics
  3. /1.2 Conservation and dissipation of energy

40 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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