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Kirchhoff loop problem

  1. Oct 21, 2009 #1
    1. The problem statement, all variables and given/known data
    We are to find I1, I2 and I3 in the diagram.


    2. Relevant equations
    These are the three equations I got. I need to know if they're correct.
    x=I1
    y=I2
    z=I3

    12y-24+35x=0
    35x+34z-18=0
    x=y+z

    3. The attempt at a solution
    Values I got on solving:
    I1=0.508
    I2=0.511
    I3=0.0029

    (Note: r=1 ohm)

    kindly tell me if this is correct!! :)
     

    Attached Files:

  2. jcsd
  3. Oct 21, 2009 #2
    Sign convention followed:

    In the direction of the current=positive
    Negative to positive plate=negative
     
  4. Oct 21, 2009 #3
    The solution is correct. I almost never use the voltage/loop rule.

    If you give the node at the top an unknown potential V, and the node at the bottom a potential
    0, you only have to use the current rule once to get a single equation for V.
     
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