Quick Mesh Analysis Question

Discussion in 'Homework Help' started by yan500, Jul 23, 2011.

  1. yan500

    Thread Starter Member

    Jul 12, 2011
    48
    0
    Hey all, I'm trying to apply the Mesh Current theory to Question 19 on this worksheet: http://www.allaboutcircuits.com/worksheets/dc_sp.html

    I keep getting these equations:

    24 - 1500Ia - 2200(Ia+Ib) = 0

    -2200(Ia + Ib) + 5000Ib = 0

    This second equation throws me for a "loop" (haha get it?). I keep getting a HUGE current which can't possibly be right. So what am I doing wrong?

    Edit: I solved this problem using the easy way (combining the resistances and getting a total current and then splitting the resistors one by one) and got the right answer but I see this as a nice way to practice Mesh Current theory.
     
  2. blah2222

    Well-Known Member

    May 3, 2010
    554
    33
    Have to keep your passive sign convention consistent.
     
  3. yan500

    Thread Starter Member

    Jul 12, 2011
    48
    0
    Hmm...so the second equation is numerically correct?

    Edit: I also solved the problem and got the right answer using the Branch method.
     
    Last edited: Jul 23, 2011
Loading...