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3 Conservation of energy

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Question 4

An electric fan receives the same input energy before and after a modification. Its efficiency increases from 30% to 50%.

What percentage of the energy dissipated before the modification is dissipated after it?

[1]
A

28.6%28.6\%28.6%

B

71.4%71.4\%71.4%

C

50.0%50.0\%50.0%

D

70.0%70.0\%70.0%

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3 Conservation of energy Questions

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

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