As an example, consider a charged spherical shell "S" of negligible thickness, with a uniformly distributed charge "Q" and radius "R". We can use Gauss's law to find the magnitude of the resultant electric field "E" at a distance "r" from the center of the charged shell. It is immediately apparent that for a spherical Gaussian surface of radius "r" < "R" the enclosed charge is zero: hence the net flux is zero and the magnitude of the electric field on the Gaussian surface is also 0 (by letting "Q""A" = 0 in Gauss's law, where "Q""A" is the charge enclosed by the Gaussian surface).