State Gauss's law in electrostatics. Applying Gauss's law derive the expression for electric intensity due to an infinite plane sheet of charge.

Define electric flux. Applying Gauss's law and serive the expression for electric intensity due to an infinite long straight charged wire. (Assume that the electric field everywhere radial and depends only on the radial distance r of the point from the wire.)

Derive an expression for the electric potential due to a point charge.

Sate Gauss's law in electrostatics and explain its importance.

Define intensity of electric field at a point. Derive an expression for the intensity due to a point charge.