Biot-Savart Law (Long Wire)
B = μ0·I / (2·π·r)
What it says
The magnetic field at a distance from a long straight current-carrying wire falls off inversely with that distance.
Symbols
| Symbol | Quantity | Dimension |
|---|---|---|
B | Magnetic field (T) | M T^-2 I^-1 |
mu0 | Vacuum permeability (1.257e-6 T·m/A) | M L T^-2 I^-2 |
I | Current (A) | I |
r | Distance from wire (m) | L |
Work it out
Enter what you know. No account needed.
Connects to
Filed under Electromagnetism · derive through it in the explorer