O-LevelPhysicsEnergy & Work5054/12 · Oct/Nov 2016 · Q161 Mark

Which expression gives the efficiency of an a.c. generator?

Aelectrical energy output total energy input

Belectrical energy output thermal energy output

Ctotal energy output electrical energy input

Dthermal energy output total energy input

✓ Correct answer

A: electrical energy output total energy input

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Topic: Energy & Work, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2016 Paper 1 Variant 2, question 16.

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