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Two equally charged, indentical metal sp...

Two equally charged, indentical 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 removed. The magnitude of the net electric force on `A` is

A

F/4

B

3F/4

C

F/2

D

F/4

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A
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