- #1

bob92

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**1. The problem:**

In the capacitor circuit shown below C1 = 4␣F, C2 = 12␣F, C3 = 12␣F, and C4 = 3␣F. The switch (S) between A and B is closed and the energy stored in C3 is 1.35x10-3 J. If the switch is now opened calculate the change in the charge on C2. Assume the potential difference between C and D is constant.

**Here is the work that I have:**(sorry the picture is too big to directly link)

http://i.imgur.com/qnTvK.jpg

The question asks what is the change in charge in C2 (the one on the lower left). The correct answer is -99uC but I can't even get my answer close.

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