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Homework Help: Quick capacitor image question

  1. Jan 31, 2009 #1
    Quick capacitor question

    1. The problem statement, all variables and given/known data
    Three capacitors are connected to a battery as shown in the figure below. Their capacitances are C1 = 3C, C2 = C, and C3 = 5C
    What is the equivalent capacitance of this set of capacitors (in terms of C)?

    2. Relevant equations
    In parallel, Ctot=C1+C2+...+Cn
    In series, 1/Ctot=1/C1+1/C2+...+1/Cn

    3. The attempt at a solution
    my book never says how to add capacitors that are both in series and parallel, so i have no idea. i know the formulas above, but idk how to combine them...
    Last edited: Jan 31, 2009
  2. jcsd
  3. Jan 31, 2009 #2
    Do it in two parts.Use your first equation above -this gives you the single capacitor that can replace C2 and C3 and now you are left with this single capacitor in series with C1
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