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Calculating efficiency — OCR GCSE Physics A J249

Home
Physics
OCR GCSE Physics A
Energy
Power and efficiency
Calculating efficiency

OCR GCSE Physics A · J249

Calculating efficiency

What you need to know

Calculate energy efficiency for any energy transfer.

$\text{Efficiency} = \frac{\text{Useful energy output}}{\text{Total energy input}}$

Revision notes

1
Calculating efficiency
4 key terms

Practise with past papers Key terms & definitions

Previous subtopicPower ratings Next subtopicIncreasing efficiency

Useful energy output