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

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

Derive an expression for the electrostatic potential energy of a system of two point charges and find its relation with electric potential of a charge.

Derive an expression for atmospheric pressure.

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

Applying Gauss's law derive the expression for electric intensity due to a charged conducting spherical shell at (i) a point outside the shell (ii) a point on the surface of the shell and (iii) a point inside the shell.

Derive an expression for the intensity of the electric field at a point on the axial line of an electric dipole.