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Can you please help me with this thevenin problem ?

  1. Dec 4, 2012 #1
    Can you please help me with this thevenin problem ???

    Please guys can you help me with this??
    http://forum.allaboutcircuits.com/cache.php?url=http://s14.postimage.org/9eysbodr5/image.png [Broken]
    I set all sources to 0 so we have Rth=3.667 KΩ
    then using superposition and remove the current source and replace it with open circuit so we have Vth1 =-3.333 V
    then remove the voltage source and replace it with short circuit so we have Vth2=25 V
    so Vth=25-3.3333=21.667 V

    other friends tell me that Vth2=30 V

    what's the correct ??
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Dec 4, 2012 #2

    gneill

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    Staff: Mentor

    Re: Can you please help me with this thevenin problem ???

    Listen to your friends :wink:
     
    Last edited by a moderator: May 6, 2017
  4. Dec 4, 2012 #3
    Re: Can you please help me with this thevenin problem ???

    why????
     
  5. Dec 4, 2012 #4

    gneill

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    Staff: Mentor

    Re: Can you please help me with this thevenin problem ???

    Show your work for finding Vth2. Remember that terminals A-B are an open circuit when finding the Thevenin voltage.
     
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