Question

In Figure 25-51, V = 5.4 V, C1 = C2 = 37 μF, and C3 = C4 = 19 μF. What is the charge on capacitor 4?
http://i45.tinypic.com/2cwrl3b.gif
I'm not sure if the awnser is 33.6 or 34.2

Answer 1

correct answer should be 33.6

Answer 2

find out the equivalent capacitance in this network den multiply it by the PD of the battery. It will give charge supplied by the battery. Suppose battery supplies Q charge then Q/2 charge will go on each of C4 and C3 because C3 and C4 are in parallel.
For finding the equivalent capacitance
C3 and C4 are in parallel= C3+C4
C1, (C3+C4), C2 are in series.