MathLiveElectrical power
Gives the rate at which electrical energy is transferred or dissipated in a circuit element, as the product of voltage across it and current through it. It applies to DC circuits, and to AC circuits only when V and I are RMS values and the power factor is 1 (otherwise average AC power is VI cos φ).
P = VIWhat the symbols mean
| electrical power in watts (\mathrm{W}) | |
| voltage across the element in volts (\mathrm{V}) | |
| current through the element in amperes (\mathrm{A}) |
About this formula
- FieldPhysics
- TopicElectricity and circuits
- LevelHigh school
- Also calledpower in electrical circuits, electric power formula, power voltage times current, watts from volts and amps, electrical power equation, power dissipated in circuit
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