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Delta transformation circuit

  1. Mar 16, 2009 #1
    1. The problem statement, all variables and given/known data
    http://i634.photobucket.com/albums/uu67/danilorj/circuito.jpg [Broken]
    Above is the picture of the circuit i'm trying to solve. The problem asks to find the current over the resistor of 1 ohm.


    2. Relevant equations



    3. The attempt at a solution
    Well, I found the equivalent resistence of the circuit and thus the total current. But to do this, I transformed the T-form of the circuit between the resistors 70,1 and 20 ohms in a delta-transformation. My doubt is when I know the current in each branch of the delta-form how am I suppose to find the current in each branch of the t-form? What is the relation of current between them?
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Mar 16, 2009 #2

    berkeman

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    Staff: Mentor


    Welcome to the PF, danilo. Wouldn't it be easier to just solve the circuit using Kirchoff's Current Law (KCL) equations? That would be my first approach.
     
    Last edited by a moderator: May 4, 2017
  4. Mar 16, 2009 #3
    That's a nice idea, I haven't thought that. Well, I found the current over the resistor of 1 ohm as being I = 0.1904 A. I would appreciate If you could check this answer for me.
     
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