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Physics (AS & A Level) · May / June 2019 · Paper 12 · Question 17

9702Energy conservation

A combined heat and power (CHP) station generates electrical power and useful heat. The diagram shows the input and output powers for a CHP station. What is the efficiency of the CHP station for producing useful power?

  1. A31%
  2. B38%
  3. C50%
  4. D81%

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Correct answer: D. 81%

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