Biot-Savart Law
An equation describing the magnetic field vector generated at a point in space by a steady differential electric current element.
Governing formula
dB = (μ₀ / 4π) (I dl × r̂) / r²
SI unit
T (Tesla)
In depth
Serving as the magnetostatic analogue of Coulomb's law, the Biot-Savart law integrates magnetic contributions from arbitrary current-carrying conductor geometries.
Examples in the real world
Calculating the magnetic field strength at the exact center of a circular wire loop carrying steady current I: B = μ₀ I / (2 R).