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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:

1. CV² / 2d
2. CV² / d
3. C²V² / 2d²
4. C²V² / 2d²

Correct answer: CV² / 2d

Solution

The force of attraction between the plates of a parallel plate capacitor is derived using the energy stored in the capacitor and the concept of work done. The formula is F = (1/2) * (C * V²) / d, which matches option A.

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