Obtain an expression for potential energy of the configuration of
three charges
Hence generalise the result for a system of n point charges?

Obtain an expression for potential energy of the configuration of three charges Hence generalise the result for a system of n point charges?

Find an expression for the energy of a charged capacitor.

Find an expression for the energy of a charged capacitor.

Derive an expression for potential at a point due to a group of point charges?