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Mesh Analysis Question

  1. Oct 17, 2009 #1
    I understand everything up to the point which I've marked in red...


    Can anyone explain those few lines?

    I would greatly appreciate it!

  2. jcsd
  3. Oct 17, 2009 #2
    Seems like KCL (Kirchoff's Current Law) at node A.
    i1 = i0 + i2

    (sum of currents entering) = (sum of currents leaving)
  4. Oct 17, 2009 #3
    I understand that part, but how did they derive the equation below that line?
  5. Oct 17, 2009 #4
    They just substituted into the equation above.
  6. Oct 18, 2009 #5
    Oh, I see it now. I totally misunderstood the fact that they were simply substituting i0 = i1 - i2 into the third mesh equation.

    Thanks :-)
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