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Q. Calculate the equivalent capacitance between points A and B in the circuit below .If a battery of 10 V is connected across A and B , calculate the charge drawn from the battery by the circuit .
The given capacitor network resembles a wheatstone network with the capacitors in balanced position. hence potential across PR is zero.
Now taking C1 and C2 in series, Cs1=20/3 mu farad
Similarly for C3 and C4 in series, Cs2=10/3 mu farad.
Taking Cs1 and Cs2 as parallel capacitors,
Effective capacitance is 20/3 + 10/3 = 10 mu farad.
Charge = CV= 10 x 10= 100 mu couloumb.
Now taking C1 and C2 in series, Cs1=20/3 mu farad
Similarly for C3 and C4 in series, Cs2=10/3 mu farad.
Taking Cs1 and Cs2 as parallel capacitors,
Effective capacitance is 20/3 + 10/3 = 10 mu farad.
Charge = CV= 10 x 10= 100 mu couloumb.