Key term for OCR GCSE Physics A, used in Simple circuits.
The ratio of useful power output to the total power input in a device.
Efficiency appears in OCR GCSE Physics A revision content for Electricity, especially Simple circuits and Power transfer.
Electricity
Simple circuits • Power transfer
Global challenges
Powering Earth • Transformers in National Grid
Energy
Power and efficiency • Reducing unwanted transfer
Energy
Power and efficiency • Increasing efficiency
Energy
Power and efficiency • Calculating efficiency
Energy
Power and efficiency • Energy waste in devices
Energy
Power and efficiency • Energy dissipation
Energy
Work done • Energy calculations
Energy
Work done • Conservation of energy
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