Is the force of interaction between two points charges affected due to the presence to another charge?

The force of attraction between two point charges placed at a distance 'd' apart in a medium is F. what should be the distance apart in the same medium so that the force of attraction between them becomes F/4 ?

How is the graitational force between two point masses affected when they are dipped in waterkeeping the separation between them the same?

Write general expression for force between two point charges.

Two small charged bodies interact in air with a force F. what will be the force of interaction between these bodies be after they are placed in a dielectric of permittivity K, if their potentials are kept the same as they were in air?

Electrostatic forces between two point charges is called central force. Why?