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  In an isolated parallel plate capacitor of capacitance C, the four surface have charges {Q_1},{Q_2},{Q_3}\,\,and\,\,{Q_4}\as shown. The potential difference between the plates is

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detailed solution

Correct option is C

Plane conducting surfaces facing each other must have equal and opposite charge densities. Here as the plate areas are equal, The charge on a capacitor means the charge on the inner surface of the positive plate (here it is Q2)Potential difference between the plates


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