A-LevelPhysicsWork, energy and powerOct/Nov 2012Paper 1 Q221 Mark
Trains supply coal to a power station. The table below gives quantities describing the operation of the power station. [Table with symbol and unit for power station output, number of trains per day, mass of coal on a train, energy from 1 kg of coal, number of seconds in one day] Which expression gives the efficiency of the power station?
APS / NMJ
BPSN / MJ
CNMJ / PS
DNM / PSJ
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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...
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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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