Physics · IGCSE · Cambridge · Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) · Specification point · 4.2.5 · Electricity and magnetism · Electrical quantities
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4.2.5 Electrical energy and electrical power
| Core | Supplement |
|---|---|
1 Understand that electric circuits transfer energy from a source of electrical energy, such as an electrical cell or mains supply, to the circuit components and then into the surroundings 2 Recall and use the equation for electrical power 3 Recall and use the equation for electrical energy |
4 Define the kilowatt-hour (kW h) and calculate the cost of using electrical appliances where the energy unit is the kW h