MathLiveElectric power from voltage and resistance
Gives the power dissipated in a resistor when a voltage is applied across it. It is used in circuit analysis and for calculating heating in resistive loads.
P = \frac{V^{2}}{R}What the symbols mean
| electric power dissipated (watts, W) | |
| voltage across the resistor (volts, V) | |
| resistance (ohms, \Omega) |
About this formula
- FieldPhysics
- TopicElectricity and circuits
- LevelHigh school
- Also calledelectric power formula, power voltage squared over resistance, electrical power from voltage, joule heating power formula, power dissipated in resistor
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