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Thevenin equivalent circuit

Discussion in 'Homework Help' started by fan_boy17, May 1, 2012.

  1. fan_boy17

    Thread Starter New Member

    Apr 17, 2012
    12
    0
    voltage source= 20V

    R1= 5 ohms
    R2= 5 ohms
    R3= 5 ohms

    Find the Thevenin equivalent circuit for the network external to the resistor R

    I have replaced R with an open circuit and so the voltage between the open circuit is 10V. Don't know how to go about from there.
     
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  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
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    1,381
    So you find Vth, Next you need to find Rth.
    Simply short E1 and find resistance seen from resistor R terminals.
     
  3. fan_boy17

    Thread Starter New Member

    Apr 17, 2012
    12
    0
    Why is it that we have to short E1 though?
     
  4. Jony130

    AAC Fanatic!

    Feb 17, 2009
    4,923
    1,381
    Because we need to find equivalent resistance without any source . And in the theory voltage source has a 0ohm internal resistance (act just like a short).
     
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