A-LevelPhysicsWork, energy and powerMay/June 2023Paper 1 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?
APₗ/Pₒ
BPᵢ/Pₒ
CPₗ/Pᵢ
DPₒ/Pᵢ
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The correct answer is D. This question tests the candidate's understanding of work, energy and power within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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