Equations
Power dissipated in a resistor (current)
Electricity and magnetism · id power_current_resistance
P = I^2 R
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
P | power | W | Power dissipated as heat | 0 to 1e+09 |
I | current | A | Current through the resistor | 0 to 10000 |
R | resistance | ohm | Resistance | 0.001 to 1e+09 |
Assumptions
- Ohmic resistor
- Steady current
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: power, resistor, heating, joule heating, current, resistance, watts.
Source
OpenStax University Physics Volume 2, Chapter 9 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.