1. Not finding help here? Sign up for a free 30min 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!

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


    User Avatar
    Science Advisor
    Homework Helper

    Last edited by a moderator: Apr 26, 2017
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Thevenin Equivalent Circuit