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O-LevelPhysicsEnergy & Work5054/12 · Oct/Nov 2024 · Q111 Mark

Which equation is used to calculate the efficiency of an energy transfer?

Aefficiency = useful energy output / total energy input
Befficiency = total energy input / useful energy output
Cefficiency = total energy output / total power input
Defficiency = (useful energy output) × (total energy input)

✓ Correct answer

A: efficiency = useful energy output / total energy input

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About this question

Topic
Energy & Work, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, Oct/Nov 2024 Paper 1 Variant 2, question 11.

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