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 charges (i) in air (ii) in 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 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 force between two charges in air and that in a medium of dielectric constant K is

In free space the force between two charges separated by constant distance is 9 dyn. When a charges and place in a medium of dielectric constant k, the forces between them becomes 4 dyn,. Then find the value of k

The ratio of the forces between two charges placed at a certain distance apart in air at half of the distance apart in medium of dielectric .k. is