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Elotrostatics: Energy of capacitors in series and parallel

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There is an attachment of what the problem is. I also wrote a little bit of what I tried.

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Consider the group of capacitors shown in Figure 21-39, where C1 = 13 µF and C2 = 6.4 µF. Terminals A and B are connected to a 9.0 V battery. Find the energy stored in each capacitor.

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Three capacitors are connected in series and parallel combination to a battery. Energy in each capacitor is calculated.

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Please see the attachment.

Consider the group of capacitors shown in Figure 21-39, where C1 = 13 µF and C2 = 6.4 µF. Terminals A and B are connected to a 9.0 V battery. Find the energy stored in each capacitor.

13 µF capacitor
5.265 x 10-4 J
6.4 µF capacitor
1.55 x 10-4 J
22 µF capacitor
0.45 x 10-4 J

I don't understand how to do capacitors in parallel. ...

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