Kinetic energy of an electron accelerated in a potential difference of $100\, V$ is

  • A

    $1.6 \times {10^{ - 17}}$ $J$

  • B

    $1.6 \times {10^{21}}$ $J$

  • C

    $1.6 \times {10^{ - 29}}$ $J$

  • D

    $1.6 \times {10^{ - 34}}$ $J$

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  • [AIPMT 2009]

Prove that electrostatic forces are conservative in nature and define electrostatic potential energy.