Thevenin equivalent theorem in phasor domain

Discussion in 'Homework Help' started by nyasha, Dec 9, 2010.

  1. nyasha

    Thread Starter Active Member

    Mar 23, 2009
    I have attached both the question and my attempt to the solution. Can someone please tell me if l am correct or not ?
  2. jegues

    Well-Known Member

    Sep 13, 2010
    I'm fairly certain that's not correct.

    Try taking a more conservative approach. You have two loops, and 3 nodes. One of the loops has a current source in it.

    This screams mesh analysis, because you instantly know one of the mesh currents. (i.e. i1 = -Is)

    You can solve the current in the top loop with your mesh equation, then simply write a KVL in the big "outer loop".

    Since you know the current in the top loop, you know the voltage across the 2Ω resistor.

    I found Voc to be,

    \frac{148 - j12}{13}

    Good luck!
  3. Georacer


    Nov 25, 2009
    Some pointers:

    The inductor's impedance is dependant on the frequency, much like the capacitor. Its impedance is Zi=jωL

    In your place I wouldn't assume that Z2's frequencey is 1000rads. It may be true but you can't prove it at this point.

    Keep the vector notation of the sources inside the calculations.