Equations
Power dissipated in a resistor (voltage)
Electricity and magnetism · id power_voltage_resistance
P = \frac{V^2}{R}
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
P | power | W | Power dissipated as heat | 0 to 1e+09 |
V | voltage | V | Voltage across the resistor | 0 to 1e+06 |
R | resistance | ohm | Resistance | 0.001 to 1e+09 |
Assumptions
- Ohmic resistor
- Steady voltage
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: power, resistor, heater, voltage, resistance, watts, outlet.
Source
OpenStax University Physics Volume 2, Chapter 9 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.