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Revise CIE IGCSE Physics 4.2.5 Electrical energy and electrical power with the question bank, lessons, revision guides, and flashcards.
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 • Recall and use the equation for electrical power P = IV • Recall and use the equation for electrical energy E = IVt • Define the kilowatt-hour (kW h) and calculate the cost of using electrical appliances where the energy unit is the kW h
