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7.2.4 Calculating efficiency — OCR Physics A J249 | GradeGen.AI

Physics A
Energy
Power and efficiency
Calculating efficiency

Calculating efficiency

OCR GCSE Physics A (J249) — Energy

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

Calculating efficiency

Practise with Past Papers Key Terms & Definitions

Previous SubtopicPower ratings Next SubtopicIncreasing efficiency

Useful energy output