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Can someone help with this question please? watch

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    Two identical conducting spheres on insulating supports carry charges of magnitude Q and 2Q respectively. When separated by distance d, the electrostatic force is F. The spheres are made to touch and then restored to their original separation d. If there is no loss of charge what is the new force of repulsion?

    A) F/2

    B) 3F/4

    C) 9F/8

    D) 4F/3

    Anyone have any ideas? If someone could explain the answer it would be very much appreciated with positive rep ofc
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    difficult.................
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    It's C.
 
 
 
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Updated: January 27, 2010
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