Equations
Electric potential of a point charge
Electricity and magnetism · id point_charge_potential
V = \frac{k q}{r}
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
V | electric potential | V | Potential at distance r (zero at infinity) | 0 to 1e+12 |
k | Coulomb constant | N*m^2/C^2 | 1/(4 pi epsilon_0) | |
q | charge | C | Magnitude of the source charge | 1e-12 to 0.01 |
r | distance | m | Distance from the charge | 1e-06 to 10000 |
Assumptions
- Point charge at rest in vacuum
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: electric potential, voltage, point charge, potential, volts.
Source
OpenStax University Physics Volume 2, Chapter 7 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.