Question

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

Answer 1

(i)

`1/C_(eqv)=1/2+1/6+1/2=7/6`

`C_(eqv)=6/7 μF`

(ii) `Q=C_(eqv)V`

`Q=6/7×7`

`Q=6 " μC"`

`E=1/2CV^2`

`E=1/2×6/7×(49)`

`E=21 J`