Question

The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is

(a) Independent of the distance between the plates

(b) Linearly proportional to the distance between the plates

(c) Proportional to the square root of the distance between the Plates

(d) Inversely proportional to the distance between the Plates

Answer 1

Correct option (a) Independent of the distance between the plates

Explanation:

For isolated capacitor, charge Q= constant. 

Electrostatic force F_plate = Q²/2Aε₀  

F is independent of the distance between plates.