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Kircchoff's Junction Rule

  1. Apr 24, 2015 #1
    1. The problem statement, all variables and given/known data
    circuit.png
    I can't tell what the junction equation is for the following circuit. To me it looks like I3=I1+I2+I4 but I'm not sure.

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Apr 24, 2015 #2

    robphy

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    Consider the bottom wire as a junction...
    i1 and i3 flow in
    i2 and i4 flow out
     
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