Question

is any charge in free space exist in stable equilibrium?why?​

Answer 1

Answer:

There are no points of stable equilibrium in any electrostatic field—except right on top of another charge. Using Gauss' law, it is easy to see why. First, for a charge to be in equilibrium at any particular point P0, the field must be zero. ... There must be a restoring force in order to bring back the charge at P0.