One plate of a capacitor is fixed, and the other is connected to a spring as shown in Fig. Area of both the plates is A. In steady state (equilibrium), separation between the plates is $$0.8d$$ (spring$$ was unstretched, and the distance between the plates was d when the capacitor was $$uncharged). The force constant of the spring is approximately

Question

Infinity Learn · Accepted Answer

F $$=$$ Kx ⇒$$Q22A$$ε$$0=K(0.2d)$$⇒ε$$0A0.8dE22$$Αε$$0=0.2Kd$$⇒K $$=$$ $$4$$ε$$0AE2/d3$$

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