O-LevelPhysicsEnergy & Work5054/11 · Oct/Nov 2010 · Q151 Mark

The energy output of a generator depends on its efficiency and the energy input. Which set of values is correct?

Aefficiency 0.1, energy input 50 MJ, energy output 25 MJ

Befficiency 0.2, energy input 30 MJ, energy output 6 MJ

Cefficiency 0.4, energy input 120 MJ, energy output 30 MJ

Defficiency 0.6, energy input 60 MJ, energy output 24 MJ

✓ Correct answer

B: efficiency 0.2, energy input 30 MJ, energy output 6 MJ

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Topic: Energy & Work, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2010 Paper 1 Variant 1, question 15.

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