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Thevenin's theorem

  1. Oct 12, 2015 #1
    • moved into homework foum so template headers are missing
    I don't know how to find the thevenin's equivalence of a circuit.
    In this question,it is required to find the thevenin's equivalence of the circuit.

    Firstly,I found the Rth,and the Rth is 20ohm.

    But I had difficulty in finding the Vth.
    In the first step I redrew the circuit in the following way.
    And I set a equation to find that.
    4-Vth/10=0
    And Vth is 40V.
    So finally the current going through 5ohm resistant is 1.6.
    But the current going though is 2.4 in fact.
    Have I made any mistakes in my calculation?
    Thanks
     

    Attached Files:

  2. jcsd
  3. Oct 13, 2015 #2

    ehild

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    Homework Helper
    Gold Member

    This is homework. You should have sent it to the Homework section.
    Your solution (Thevenin parameters, current through the 5 ohm resistor)
    is correct.
    How did you get 2.4 A? It is wrong.
     
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