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RC circuit help

  1. Nov 2, 2010 #1
    1. The problem statement, all variables and given/known data
    nwbpko.png


    2. Relevant Equations

    Q= Q0(e^(-t/RC))

    3. The attempt at a solution

    I need help for part C.I am confused as to what value I should put for R.

    The answer is supposed to be .166 seconds
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 2, 2010 #2
    R2 and R3 are in series when the switch opens. Did you get parts a) and b) right?

    Find when Q=.25*Q0
     
  4. Nov 2, 2010 #3
    I was confused because I thought R2 R3 were connected in parallel, but I see why they are in series now. Thanks
     
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