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GCSE Physics · key term
All the energy transferred into a device, including the parts transferred usefully and dissipated to the surroundings.
Used by Edexcel
Specification 3.11, 8.15 · Paper 1, Paper 2
Revise: Efficiency EquationTotal energy supplied: 980 J. Useful energy transferred: 950 J. Energy dissipated to surroundings: 30 J.
All the energy transferred into a device.
Divide useful energy transferred by total energy supplied, not the other way round.
Use the useful energy transferred as the numerator and the total energy supplied as the denominator.
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