Gausss Law
Gauss's law, also known as Gauss's flux theorem, is a law relating the distribution of electric charge to the resulting electric field. Gauss's law states that the net flux of an electric field through a closed surface is proportional to the enclosed electric charge. One of the four equations of Maxwell's laws of electromagnetism, it was first formulated by Carl Friedrich Gauss in 1835 and relates the electric fields at points on a closed surface (known as a "Gaussian surface") and the net charge enclosed by that surface.
The Gauss' Law is used to find electric field when the charge is continuously distributed within an object with symmetrical geometry, such as sphere, cylinder, or plane. Gauss' law follows Coulomb's law and the Superposition Principle