A-LevelPhysicsWork, energy and power9702/12 · May/June 2019 · Q171 Mark

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. [Figure 17.1] What is the efficiency of the CHP station for producing useful power?

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A31%

B38%

C50%

D81%

✓ Correct answer

D: 81%

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2019 Paper 1 Variant 2, question 17.

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