Thevenin equivalent circuit

Discussion in 'Homework Help' started by fan_boy17, May 8, 2012.

  1. fan_boy17

    Thread Starter New Member

    Apr 17, 2012
    Determine the Thévenin equivalent circuit for the portion of the
    network external to points a and b?

    if we make the points a and b open circuit then we have open circuit voltage as (30/90)30=10v. However i am not sure if this is correct because we have another voltage source of 20V.
    Last edited: May 8, 2012
  2. mlog


    Feb 11, 2012
    You're on the right track, but you do have to consider the other voltage source of 20v. Aren't these two sources (10v and 20v) in series? Be careful to observe the voltage polarities.