The plates of a parallel plate capacitor of capacity $50\,\mu C$ are charged to a potential of $100\;volts$ and then separated from each other so that the distance between them is doubled. How much is the energy spent in doing so

  • A

    $25 \times {10^{ - 2}}\,J$

  • B

    $ - 12.5 \times {10^{ - 2}}\,J$

  • C

    $ - 25 \times {10^{ - 2}}\,J$

  • D

    $12.5 \times {10^{ - 2}}\,J$

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