State the principle of superposition of charges. Obtain an expression for force on one charge due to all other charges around it.

State the principle of the conservation of charge.

State the principle of superposition of potentials. Find an expression for the potential at a point due to an electric dipole on its axis, if P is electric dipole moment.

Find an expression for electric field intensity due to a point charges.

Define electrostatic potential energy. Derive an expression for it due to a system of two charges.

Define electrostatic potential energy. Derive an expression for it due to a system of two charges.

Lines of force starts from _____ charge.