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Homework Help: Current in wire

  1. Feb 26, 2010 #1
    1. The problem statement, all variables and given/known data

    In the figure, what is the current in the wire above the junction?


    2. Relevant equations

    V=IR or I=V/R

    3. The attempt at a solution
    I am really confused as to what "above the junction" means. I tried to add the voltages and add the resistors and divide them to get the current and it didn't work. Then I tried to just do the top voltage and resistor (so it would be three) and that didn't work either. What am I doing wrong?
     

    Attached Files:

  2. jcsd
  3. Feb 26, 2010 #2
    What does Kirchhoff's Current Law say?

    Above the junction, current is labelled as I
     
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