The force on a charge situated on the axis of a small dipole is `F` .If the charge is shifted to double the distance the force acting will be `(f)/(x)` .What is `x` ?

The force on a charge, situated on an axial point of an electric dipol is F.If the distance be doubled then force will be—

Force acting on a test charge between the plates of a parallel capacitor is F. If one of the plates is removed, then the force on the same test charge will be :

An electric dipole is placed at a distance x from centre O on the axis of a charged ring of R and charge Q uniformly distributed over it. (a) Find the net force acting on the dipole. (b) What is the work done in rotating the dipole through 180^@ ?

A charge placed at a distance from an electric dipole on its axis experiences a force F. If the distance be doubled , the force will become

A point charge placed at any point on the axis of an electric dipole at some large distance experiences a force F. What will be the force acting on the point charge when its distance from the dipole is doubled.

The force between two point electric charges kept at a distance d apart in air is F. If these charges are kept at the sme distance in water, the force between the charges is F'. The ratio F'//F is equal to ……….. .