Key term for Edexcel GCSE Physics, used in Lubrication.
The ratio of useful energy output to the total energy input for a system, often expressed as a decimal or a percentage.
Efficiency appears in Edexcel GCSE Physics revision content for Forces and their effects, especially Lubrication and Lubrication.
Forces and their effects
Lubrication • Lubrication
Energy – forces doing work
Power and Efficiency • Efficiency Equation
Energy – forces doing work
Power and Efficiency • Watt Definition
Energy – forces doing work
Power and Efficiency • Power Equation
Energy – forces doing work
Power and Efficiency • Wasteful Mechanical Processes
Energy – forces doing work
Work and Energy Transfers • Closed Systems
Energy – forces doing work
Work and Energy Transfers • Energy Transfer Diagrams
Conservation of energy
Efficiency and Energy Resources • Increasing Efficiency
Conservation of energy
Conservation and Dissipation • Dissipation of Energy
Electromagnetic induction
Transformers and the Grid • High Voltage Transmission Advantages
Electromagnetic induction
Transformers and the Grid • National Grid Efficiency
Electricity and circuits
Power and Energy Equations • Power Definition
Electricity and circuits
Heating Effect and Energy • Advantages and Disadvantages of Heating
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