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Homework Help: Thevenin Problem

  1. Sep 16, 2013 #1
    1. The problem statement, all variables and given/known data
    Use thevenin techniques to find the equivalent circuit (Rth and Vth) to which the points A + B are attached.

    2. Relevant equations

    Kirchoffs loop rules

    3. The attempt at a solution
    I have indicated my chosen loops in blue. I am not quit sure at this point how to apply kirchoffs loop rule to each of the loops so that I can determine Vth. the only loop I felt confident on was number 1 i.e. 1: 5V-40ΩI1+Vth. There so much going on in the circuit that its hard from me to determine which way current is flowing so that I can create a junction rule for the wire between the yellow points. Any help would be greatly appreciated!

    Attached Files:

  2. jcsd
  3. Sep 16, 2013 #2


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    Gold Member

    So why not redraw the circuit so that it looks less confusing?

    Also, your loops 1 and 2 are useless since they "loop" around open circuits, which are not really loops at all.
    Last edited: Sep 16, 2013
  4. Sep 16, 2013 #3
    how do you purpose I re-draw it
  5. Sep 16, 2013 #4


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    Gold Member

    It was a suggestion. Don't do it if you don't want.

    You have not addressed my comment about your loops 1 and 2
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