- To find electric field due to a charge configuration using Gauss’s law we draw an imaginary closed surface around that charged distribution.
- Gaussian surfaces are normal to electric lines of & symmetric to the charge enclosed such that electric field at every point of the Gaussian surface due to that charged distribution is same.
- Gaussian surfaces are spherical for point charges or spherical distribution of charges & cylindrical for linear and planar distribution of charge.
- Only those charges which lie inside the Gaussian surface are considered & that located outside have no contribution in the flux.
- Discrete charges on the surface of the -Gaussian surface are not considered (as electric field at the location of a discrete charge is not defined) but continuous charges can be considered.