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Homework Help: Finding R_Thevenin involving dependent source

  1. May 14, 2017 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations


    Inductor = jωL; Capacitor = 1/jωC

    3. The attempt at a solution
    I attempted to excite the circuit with an Io = 1A source, and then from Zc = 1/jX2 justify Vx = (1)(Zc)

    Thus, substituting our found Vx and then doing a source transformation, we find our V = g(Vx)(jX1), and thus, our RTh = V/Io, which is not correct. The correct answer is #1 in the image.
  2. jcsd
  3. May 15, 2017 #2


    User Avatar

    Staff: Mentor

    Exciting the circuit with a current source is good. I think that where you've gone wrong is after your source transformation.
    The voltage source from that transformation is not the potential that appears across ab. There are now two components between that source and the "a" terminal, the impedance X1 associated with the transformed source and the capacitor's X2.
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