MathLiveElectrical energy from power and time
Gives the electrical energy transferred or used by a device as the product of its electric power and the time over which that power acts, assuming the power is constant. For varying power the energy is the integral of power over time. It is used for calculating energy consumption on electricity bills and in circuit analysis.
W = P \cdot tWhat the symbols mean
| electrical energy (joules, J; or kilowatt-hours, kWh) | |
| electric power (watts, W) | |
| time (seconds, s; or hours, h) |
About this formula
- FieldPhysics
- TopicElectricity
- LevelHigh school
- Also calledelectrical energy, electric energy, energy equals power times time, electric energy formula, work equals power times time
- SourceWikidata Q206799
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