Write general expression for force between two point charges.

State Gauss' theorem in electrostatics. Hence obtain expression for the force between two point charges.

Write expression for the force between two short parallel wires carrying a current, when they are much separate?

State principle-of superposition of charges and using it find an expression for force acting at a point charge due to assembly of ‘n’ point charges.

Write a relation for the electrostatic force between two point charges placed in a dielectric medium.