Gauss's lawIn physics, Gauss's Law gives the relation between the electric flux flowing out a closed surface and the charge enclosed in the surface:
In the case of a spherical surface with a central charge, the electric field is perpendicular to the surface, with the same magnitude at all points of it, giving the simpler expresion:
Gauss's law can be used to demonstrate that there is no electric field inside a Faraday cage without electric charges. Gauss's law is the electrical equivalent of Ampere's law, which deals with magnetism. Both equations were later integrated into Maxwell's equations.