(i) Find equivalent capacitance between A and B in the combination given below. Each capacitor is of 2μF capacitance.

(ii) If a dc source of 7 V is connected across AB, how much charge is drawn from the source and what is the energy stored in the network?

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Solution

1 over straight C subscript eqv space equals space 1 half space plus 1 over 6 space plus 1 half space equals space 7 over 6 straight C subscript eqv space equals space 6 over 7 space μF ii right parenthesis space straight Q space equals space straight C subscript eqv straight V space equals space 6 over 7 space straight x space 7 space equals space 6 space μC straight E space equals 1 half space CV squared space equals space 1 half space straight x 6 over 7 straight x space left parenthesis 49 right parenthesis space equals space 21 space straight J

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