Equations
Ohm's law
Electricity and magnetism · id ohms_law
V = I R
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
V | voltage | V | Potential difference across the resistor | 0 to 1e+06 |
I | current | A | Current through the resistor | 0 to 10000 |
R | resistance | ohm | Resistance | 0 to 1e+09 |
Assumptions
- Ohmic (linear) conductor
- Steady current
Valid when
- Constant temperature
- Not valid for diodes or other non-ohmic devices
Found by
Questions with these words retrieve this equation: electromagnetism, circuit, current, voltage, resistance, resistor, battery, ohm.
Source
OpenStax University Physics Volume 2, Chapter 9 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.