PrepZii

mixed

Moving Charge and Biot-Savart Law

The source starts magnetic field with a moving point charge and the current-element form of Biot-Savart law.

Moving point charge

\vec B=\frac{\mu_0}{4\pi}\frac{q(\vec v\times\vec r)}{r^3}

Biot-Savart law

d\vec B=\frac{\mu_0 I}{4\pi}\frac{d\vec l\times\vec r}{r^3}

moving charge field

$B$

magnetic field

$\mu_0$

permeability of free space