1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

RC circuit problem

  1. Feb 25, 2007 #1
    1. The problem statement, all variables and given/known data

    In Figure P18.50, suppose that the switch has been closed for a length of time sufficiently long enough for the capacitor to become fully charged. (R = 12.0 k, R2 = 17.0 k, R3 = 1.00 k, V = 9.70 V)

    The picture is under attachment

    a) Find the steady-state current in each resistor.
    I1 = µA?
    I2 = µA?
    I3 = µA ?

    (b) Find the charge on the capacitor.
    µC ?

    2. Relevant equations

    R = V / I

    q = Q e^(-t/RC)

    3. The attempt at a solution

    Well, since after the switch is closed, I figured all 9.7 V goes to the first resistor, so I used R = V / I to get the current for the first one. But it's wrong.

    Attached Files:

  2. jcsd
  3. Feb 26, 2007 #2


    User Avatar

    Staff: Mentor

    It's wrong because there is a voltage divider formed with one of the other two resistors in the steady state. Which one? In the steady state, what is the voltage across the capacitor?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: RC circuit problem
  1. RC circuit problem (Replies: 13)

  2. RC Circuit problem (Replies: 5)

  3. RC Circuit Problem (Replies: 16)