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3.2 Dissipation and efficiency

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Question 23
F

A machine has an efficiency of 60%. Each completed operation transfers 90 J usefully.

How much total energy is supplied to the machine for four operations?

[1]
A

216 J216\ \mathrm{J}216 J

B

360 J360\ \mathrm{J}360 J

C

600 J600\ \mathrm{J}600 J

D

150 J150\ \mathrm{J}150 J

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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