4. Four charges are kept at the corner points of a square. The net force on a charge kept at the center of the square is _________ a) Along diagonal b) Zero c) Along one side d) Depends on the nature of the charges
Answer: d Explanation: Depending on the nature and quantity of charges, the net force on the central charge may vary its magnitude and direction. If all the charges are the same the net force will be zero.
