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19 June, 11:08

Two uncharged metal spheres, #1 and #2, are mounted on insulating support rods. A third metal sphere, carrying a positive charge, is then placed near #2. Now a copper wire is momentarily connected between #1 and #2 and then removed. Finally, sphere #3 is removed. In this final state

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  1. 19 June, 13:23
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    The question is incomplete as some details are missing, here is the details;

    In this final state

    a) spheres #1 and #2 both carry negative charge.

    b) sphere #1 carries negative charge and #2 carries positive charge.

    c) spheres #1 and #2 are still uncharged.

    d) sphere #1 carries positive charge and #2 carries negative charge.

    e) spheres #1 and #2 both carry positive charge.

    Explanation:

    From the concept of electrostatics, if a positively charged sphere is brought close to #2, there will be attraction of the opposite charges (-ve) towards it.

    Now connecting a copper wire between #1 and #2, opposite charges will flow from #1 towards #2. disconnecting the copper wire makes #1 to be positively charged and #2 to be negatively charge and from the laws of attraction; Like charges repel and unlike charges attract. the correct option is d.
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