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3 Conservation of energy

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Question 17

An electric food mixer is supplied with 800 J while mixing some ingredients. Of this energy, 120 J is dissipated to the surroundings.

What is its efficiency?

[1]
A

15%15\%15%

B

0.85%0.85\%0.85%

C

85%85\%85%

D

87%87\%87%

Markscheme

3 Conservation of energy Questions

  1. GCSE
  2. /Physics
  3. /3 Conservation of energy

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