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Two conducting plates A and B are placed...

Two conducting plates A and B are placed parallel to each other. A is given a charge `Q_1` and B a charge `Q_2`. Prove that the charges on the inner surfaces are of equal magnitude and opposite sign.

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Consider a Gaussian surface as shown in figure. Two faces of this closed surface lie completely inside the conductor where the electric field is zero
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ALLEN-MISCELLANEOUS-Part -II Example
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