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1.2 Conservation and dissipation of energy

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Question 2
F

An electric lamp transfers 60 J of energy from the mains supply. The lamp transfers 5 J of energy usefully by light. What happens to the other 55 J of energy?

[1]
A

it is destroyed as the metal parts of the lamp become hot

B

it is stored more usefully in the light given out by the lamp

C

it is returned to the mains supply when the lamp is switched off

D

it is dissipated, so it is stored in the surroundings less usefully

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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