A-LevelPhysicsWork, energy and powerOct/Nov 2021Paper 1 Q181 Mark
The energy conversions inside a power station burning fossil fuel can be simplified as shown. chemical energy W → thermal energy X → electrical energy Y Which expression gives the efficiency of the power station?
AY / W
BY / (W + X)
CY / X
DY / (W + X + Y)
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of work, energy and power within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
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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