Thursday, 4 April 2013

Calculating Electric Field Using Gauss Law

Electric field due to a point charge

First, we shall look for the symmetry of the field. Clearly the field is spherically symmetric. If we enclose the charge in a sphere of radius R, the magnitude of electric field will be same at any point on the surface.

By Gauss law, [ qenc = q]

[ qenc = q]

 This is the same result as given by Coulomb's law.

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