The force between two electrons separated by a distance r is proportional to

The force between two electrons separated by a distance r varies as

The force between two electrons separated by a distance r varies as

The force between two short electric dipoles separated by a distance r is direcly proportional to :

The force between two short electric dipoles separated by a distance r is direcly proportional to :

The ratio of gravitational force and electrostatic force between two electrons separated by a distance of 10 cm is of the order of 10 ^(42 )

Force between two charges q_1 and q_2 separated by a distance r is proportional to q_1q_2//r^(2). Proportionality constant is

The force between two alpha particles separated by a distance 'r' is F. In order to have same force the distance between single ionized chlorine atoms separated by a distance of