Two equally charged, identical metal sph...

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

`3F/4`

`F/2`

`F/4`

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