A-LevelPhysicsWork, energy and power9702/12 · May/June 2023 · Q151 Mark

A steam turbine is used to drive a generator. The input power to the turbine is Pᵢ and the output power is Pₒ. The power loss in the turbine is Pₗ, as shown. [Figure 15.1] What is the efficiency of the turbine?

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APₗ/Pₒ

BPᵢ/Pₒ

CPₗ/Pᵢ

DPₒ/Pᵢ

✓ Correct answer

D: Pₒ/Pᵢ

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2023 Paper 1 Variant 2, question 15.

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