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

NEETNEET 2018Electrostatic Potential and Capacitance

Solution:

For isolated capacitor $Q =$ Constant
$F_{\text {plate }}=\frac{Q^{2}}{2 A \varepsilon_{0}}$
$F$ is Independent of the distance between plates.