Two equally charged, identical metal spheres A and B repel

Last updated: 7/31/2022

Two equally charged, identical metal spheres A and B repel each other with a force 'F'. The spheres are kept fixed with a distance 'r' between them. A third identical, but uncharged sphere C is brought in contact with A and then placed at the mid-point of the line joining A and B. The magnitude of the net electric force on C is A. F B. 3F/4 C. F/2 D. F/4