Two particles A and B having charges 20 μC and –5 μC respectively are held fixed with a separation of 5 cm. At what position a third charged particle should be placed so that it does not experience a net electric force?
(1) At 5 cm from 20 μC on the left side of system
(2) At 5 cm from – 5 μC on the right side
(3) At 1.25 cm from – 5 μC between two charges
(4) At midpoint between two charges
