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## Homework Statement

Examine the figure shown. Note that C3 = 10.5 uF, and C1 = C2 = 2C3. Also the battery voltage is Vb = 39.0 volts.

## Homework Equations

What is the equivalent capacitance for this arrangement?

How much charge is stored on C1?

## The Attempt at a Solution

C2 and C3 are in parallel, so I used C'=C2+C3

C' is in series with C1, so the total capacitance, C'' is:

((C1)(C'))/(C1+C')

which is equal to:

((C1)(C2+C3))/(C1+C2+C3)

pluging in values, I get an answer of 12.6 uF. I am using an online homework program and am told that this is incorrect. What am I doing wrong?

For the second question, shouldn't I multiply my answer for the first part by the volts value given?

Thank you for you help.