## FANDOM

181 Pages

Lorentz force law helps in defining both electric field and magnetic field:

$\overrightarrow{F} = q \overrightarrow{E} + q( \overrightarrow{v} X \overrightarrow{B} )$

The electric force is straightforward, being in the direction of the electric field if the charge q is positive, but the direction of the magnetic part of the force is given by the right hand rule.