The ratio of the force between two small conducting spheres of equal charge in (a) a medium of dielectric constant 2, and (b) air is respectively

The ratio of the forces between two small spheres with constant charges (i) in air (ii) in medium of dielectric constant K is, respectively.

The ratio of the force between two small spheres (with constant charges) F_(1) in air and F_(2) in a medium of dielectric constant k is respectively..

The ratio of the forces between two small spheres with constant charge 'a' in air and 'b' in a medium of dieletric constant k is

The ratio of force between two small charged sphere(i)in air(ii)in a medium of dielectric constant'K' is

The ratio of the force between two charges in air and that in a medium of dielectric constant K is

If F is the force between two point charge submerged in a medium of dielectric constant K, then on withdrawing the mediun the force between the charges becomes.......

The electrostatic force between two charges distance r apart in vaccum is F. The force between the same charges distance r/2 apart in a medium of dielectric constant 2 is