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1.2 Conservation and dissipation of energy

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Question 2

During a short test, an electric food mixer is supplied with 400 J of energy. 100 J of this energy is dissipated to the surroundings.

What is the efficiency of the food mixer?

[1]
A

0.75

B

0.25

C

0.33

D

1.33

Markscheme

1.2 Conservation and dissipation of energy Questions

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

104 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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