Two equally charged identical small balls kept some fixed disttance apart exert a repulsive force F on each other. A similar uncharged ball, after touching one of them is placed at the mid-point of line joining the two balls. Force experienced by the third ball is

Two equally charged small metal balls placed at a fixed distance experience a force F. A similar unchanged metal ball after touching one of them is placed at the middle point between the two balls. The force experienced by this ball is

Two identical metals balls with charges +2Q and -Q are separated by some distance and exert a force F on each other . They are joined by a conducting wire , which is then removed. The force between them will now be

Two identical metals balls with charges +2Q and -Q are separated by some distance and exert a force F on each other . They are joined by a conducting wire , which is then removed. The force between them will now be

Two equally charged, identical metal spheres A and B rpepel 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 thr line joining A and B. the magnitude of the net electric force on C is

Two small identical metal balls of radius rare at a distance a (a lt lt r) from each other and are charged, one with a potential V_(1) and the other with a potential V_(2) . The charges on the balls are: