# Gauss’s Law¶

Gauss’s Law relates electric flux () on a surface (S) to the enclosed charge (Q):

See also Wikipedia: Gauss’s_law.

Gauss’s law is closely related to the Poisson Equation (and Laplace Equation), used by SIMION Refine. Gauss’s law is also sometimes useful for Charge-Capacitance Calculation.

## Gauss’s Law for Magnetism¶

Related formulas exists for magnetic fields, but the right-hand-side is always zero assuming magnetic monopoles don’t exist:

See also Wikipedia: Gauss%27s_law_for_magnetism.