The charges on two sphere are $+7\,\mu C$ and $-5\,\mu C$ respectively. They experience a force $F$. If each of them is given and additional charge of $-2\,\mu C$, the new force of attraction will be

  • A

    $F$

  • B

    $F / 2$

  • C

    $F/\sqrt 3 $

  • D

    $2F$

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