When an insulated charged spherical conductor is brought near a light, small spherical conductor suspended with a silk fibre, (i) it quickly comes and sticks in the charged sphere and (ii) Instantly moves away and remains stationary In a deflected position explain the phenomena.

Explanation

(i) When the insulated charged spherical conductor is brought near the small spherical conductor suspended with a silk fibre, unlike charge is induced on the near end of the small sphere and like charge on the far end. As the unlike induced charge is nearer to the inducing charge, the small conductor suspended by the silk fibre is attracted and comes in contact with the insulated charged sphere. (ii) As soon as the small sphere comes in contact with the insulated charged sphere, the former gets the same charge on it. Due to mutual repulsion of like charges, the small sphere instantly moves away from the insulated charged sphere, up to a distance such that the tension in the fibre, weight of the suspended ball and the repulsive force given by the charged sphere keep the suspended ball in equilibrium