A parallel plate air capacitor has capacity C, distance of separation between plates is d and potential difference $V$ is applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is
${{C{V^2}} \over d}$
${{{C^2}{V^2}} \over {2{d^2}}}$
${{{C^2}{V^2}} \over {2d}}$
${{C{V^2}} \over {2d}}$
Solution
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