A parallel plate air capacitor has capacity $ C $, distance of separation between plates is $ d $ and potential difference $ V $ is applied between the plates. The force of attraction between the plates of the capacitor is

Question

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

MARKS App · Accepted Answer

Attraction force between the plates, F = q 2 2 A ε 0 where q = C V and C = ε 0 A d ⇒ F = C 2 V 2 2 C d = C V 2 2 d

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