(i) Find equivalent capacitance between A and B in the combination give below . Each capacitor is a of `2 muF` capacitance .

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

Explanation

(i) Point P and S are at same potential
Point R and T are at same potential.

`(1)/(C_(AB))=(1)/(2)+(1)/(6)+(1)/(2)`
`(1)/(C_(AB))=(7)/(6) rArr C_(AB)=(6)/(7)muF`
(ii) `Q=C_(AB)V=(6)/(7)xx7=6muC`
`U=(1)/(2)QV=(1)/(2)xx6muCxx7=21xx10^(-6)J`