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Question

The capacitance between the adjacent plates shown in figure (31-E20) is 50 nF. A charge of 1.0 μC is placed on the middle plate. (a) What will be the charge on the outer surface of the upper plate ? (b) Find the potential difference developed between the upper and the middle plates.

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Solution

(a) When charge of 1 μC is introduced to the B plate, we also get a 0.5 μC charge on the upper surface of plate A

(b) Given, C=50 μF=50×109 F

=5×108 F

Now charge =0.5×106 C

v=10 V


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