A metal parallel plate capacitor has 100mm diameter and the distance between the plates is ‘a’ mm. The capacitor is placed in air. Force on each plate is 0.035N and the potential difference between the plates is 1kV. Find ‘a’.

A metal parallel plate capacitor has 100mm diameter and the distance between the plates is ‘a’ mm. The capacitor is placed in air. Force on each plate is 0.035N and the potential difference between the plates is 1kV. Find ‘a’. Correct Answer 1mm

From the given data: A=pi*d2/4=0.007854m2 Potential gradient = V/x = 1000/a F=epsilon*A*(V/x)2/2 Substituting the given values, we find a=1mm.
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