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Electrical energy and electrical power
Recognize that electric circuits convey energy from a source of electrical energy, like a battery or mains supply, to the components of the circuit and subsequently to the environment.
4
Objectives
40
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28
Questions
90 min
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CambridgeIGCSEPhysicsElectricity and magnetism
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4 objective pages available
Electrical energy and electrical power outcomes4 objectives
- Recognize that electric circuits convey energy from a source of electrical energy, like a battery or mains supply, to the components of the circuit and subsequently to the environment.
- Memorize and apply the formula for electrical power, expressed as P = V I.
- Memorize and apply the formula for electrical energy, represented as E = Vt I.
- Explain the kilowatt-hour (kW h) and compute the expense of operating electrical devices where energy is measured in kW h.
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