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Thevenin Equivalent Circuit

  1. Jun 13, 2011 #1
    1. The problem statement, all variables and given/known data

    Find the Thevening Equivalent Circuit for the following circuit:


    2. Relevant equations

    KVL, KCL.

    3. The attempt at a solution

    First of all, I calculate the current in the middle mesh, which I'll call i2:

    [tex] - j25 = ({i_2} - {i_1})(3 + j4) + {i_2}(10)[/tex]

    where i1 is the current defined by the current source. Once I've got i2, I multiply that by 10 to get the voltage in the 10 ohm resistor, and after that I calculate Vab using:

    [tex]{V_{ab}} = j25 - 10({i_2})[/tex]

    However, the result is incorrect (should be 22,2 V with a 98º angle). What am I doing wrong? I've used the same method with other circuits and it worked just fine.
  2. jcsd
  3. Jun 14, 2011 #2


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