Electric Field of a Point Charge
E = k_e·Q / r^2
What it says
The electric field strength at a distance from a point charge falls off with the square of the distance. The constant k_e is the Coulomb constant (8.99e9 N·m^2/C^2).
Symbols
| Symbol | Quantity | Dimension |
|---|---|---|
E | Electric field (N/C) | M L T^-3 I^-1 |
Q | Source charge (C) | T I |
r | Distance from charge (m) | L |
Work it out
Enter what you know. No account needed.
Connects to
Filed under Electromagnetism · derive through it in the explorer