What is gauss law?

Gauss law States that the total electric flux passing through  closed surface is equal to 1by Epsilon naught  times of the net enclosed by the surface.

Electric flux through a closed surface is 'x' times the net charge enclosed by the surface. Value of 'x' is equal to:

A closed surface encloses a net charge of 2.90 \mu {\rm C}. What is the net electric flux through the surface?If the electric flux through a closed surface is determined to be 2.50 {\rm N \cdot m^{2}/C}, how much charge is enclosed by the surface?

1. explain why the electric flux through a closed surface with a given enclosed charge is independent of the size or shape of the surface.