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Homework Help: Very confusing capacitor question

  1. Feb 21, 2010 #1
    1. The problem statement, all variables and given/known data

    C1=2[μF] and C2=6[μF] are first connected individually to their own 12[V] battery ; after disconnecting from the batteries, C2's + side is then connected to C1's − side
    . . . the battery 2's + side is connected to the battery 1's − side , and the other sides are connected to C3=4[μF] ; after disconnecting from the batteries, C3's + side → C1's + side , and C3's − side → C2's − side .
    (a) How much charge is on each capacitor
    (b) what Voltage is across each Capacitor
    (c) how much Energy does each store ?

    2. Relevant equations

    Q=VC, PE=.5CV^2

    3. The attempt at a solution

    I am at a loss as to how this circuit is supposed to end up looking. I ended up drawing 3 capacitors in series, C1 into C3 into C2. Now, to find the charge I just did Q=VC for each one and got answers, but then the next question is the voltage across them, if I use V=Q/C it's just going to give me the voltage I used in the last problem. So i'm doing one of those wrong. And the question is just very confusing to me.

    Thanks for any help
  2. jcsd
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