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(i) Find equivalent capacitance between...

(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 ?

Text Solution

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(i) `C_(eq)` in `PRST = 2+2+2= 6 muF`,
Remaining capacitors between A and B are in series .
`:. 1/C =1/2 + 1/6 + 1/2 = (3+1+3)/(6) = 7/6`
`rArr C = 6/7muF`
(ii) `Q = CV`
`= 6/7 xx 10^(-6) xx 7= 6 xx 10^(-6) C`
`E= 1/2 CV^(2) = 1/2 xx (6xx10^(-6))/(7) xx 49 = 21 xx 10^(-6)J`.
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