A parallel plate capacitor has its plate horizontal with air occupying the space between the plates. The upper plate is fixed with a rigid support and lower one is connected to an ideal spring as shown in the figure. The distance between the plates is d1. Now the capacitor is connected with an electric source with the voltage V. The separation between the plate changes to d2 while in equilibrium. The mass of lower plate is m and cross –section area of each plate is A.

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A parallel plate capacitor has its plate horizontal with air occupying the space between the plates. The upper plate is fixed with a rigid support and lower one is connected to an ideal spring as shown in the figure. The distance between the plates is d₁. Now the capacitor is connected with an electric source with the voltage V. The separation between the plate changes to d₂ while in equilibrium. The mass of lower plate is m and cross –section area of each plate is A.

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