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Which among the following is the correct expression for force between the plates of a parallel plate capacitor?(a) F=epsilon*A*(V/x)^2/2(b) F=epsilon*A*(V/x)^2/3(c) F=epsilon (V/x)^2/2(d) F=epsilon (V/x)^2/3I had been asked this question in exam.This intriguing question originated from Force of Attraction Between Oppositely Charged Plates topic in portion Capacitance and Capacitors of Basic Electrical Engineering

Answer» RIGHT option is (a) F=epsilon*A*(V/x)^2/2

The best EXPLANATION: The force is proportional to the square of the potential GRADIENT and the area. HENCE the force F=epsilon*A*(V/x)^2/2.


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