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3.2 Dissipation and efficiency

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Question 33
F

Oil is added between the moving parts of a machine.

Why does this reduce unwanted energy transfer?

[1]
A

Friction decreases, so less energy is transferred by heating.

B

Friction increases, so less energy is transferred by heating.

C

Friction decreases, so more energy is transferred by heating.

D

Friction increases, so more energy is transferred by heating.

Markscheme

3.2 Dissipation and efficiency Questions

  1. GCSE
  2. /Physics
  3. /3.2 Dissipation and efficiency

100 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency, covering 3.2.1 Dissipation of energy, 3.2.2 Reducing unwanted energy transfers, 3.2.3 Efficiency, and 3.2.4 Increasing efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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