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3.2 Dissipation and efficiency

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Question 23

For a commercial tidal stream generator:

  • the kinetic energy input per second from the flowing tidal current is 18.5 MJ18.5\text{ MJ}18.5 MJ
  • the useful electrical energy output per second is 5.92 MJ5.92\text{ MJ}5.92 MJ.

Calculate the efficiency of this tidal stream generator.

[2]
Markscheme

3.2 Dissipation and efficiency Questions

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

38 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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