Cambridge IGCSE Physics
4.2.5Electrical energy and electrical power
Electrical energy and electrical power in Cambridge IGCSE Physics: what the syllabus expects you to know, the learning objectives and how to practise.
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Learning objectives
What the syllabus expects you to be able to do.
- 4.2.5.1Understand that circuits transfer energy from a source, such as a cell or the mains, to the components and then to the surroundings.
- 4.2.5.2Use P = IV.
- 4.2.5.3Use E = IVt.
- 4.2.5.4Define the kilowatt-hour and calculate the cost of using appliances when energy is measured in kW h.
Lessons
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Electrical power, energy and cost
30 min
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Sample question
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