Question

what is gaussian surface?

Answer 1

A Gaussian surface  is a closed surface in three-dimensional space through which the flux of a vector field is calculated

Answer 2

Answer:

The Gaussian surface around a charge distribution is a closed surface, such that the electric field intensity at all the points on the surface is same and the electric flux through the surface is along the normal to the surface.

Explanation:

The expression for electric field intensity can be obtained by applying Coulomb's law only in simple cases.