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Homework Help: Circuits II, can someone check my equations ? Phasor Mesh Analysis

  1. Feb 26, 2010 #1
    EDIT I mean nodal, not mesh analysis xD

    http://img205.imageshack.us/img205/5931/omgt.jpg [Broken]




    http://img694.imageshack.us/img694/2570/omg2p.jpg [Broken]

    Are my are my equations correct?

    Here is the solution according to wolfram!
    http://www.wolframalpha.com/input/?...v2/(i*2*2)+(v2-v1)/(1/(2*i*0.2))+(v2-3v1)/4=0

    or

    http://www.wolframalpha.com/input/?...++b*0.25+++b*0.15*i++-+a+*0.75+-+a*0.4*i++=+0

    but it still doesn't match the book's answer, I am not sure what's wrong :(

    help plz
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Feb 27, 2010 #2
    Nodal analysis not mesh analysis :),

    Anyone?
     
  4. Feb 27, 2010 #3

    The Electrician

    User Avatar
    Gold Member

    Your equations look correct, and I get the same solution you did. This is apparently one of those cases where the book has a wrong solution.

    I allowed Mathematica to search for component values that would give the solution from the book. Setting the inductor to 3H and the capacitor to .3F came close.
     
  5. Feb 28, 2010 #4
    Thanks, you have confirmed what I have suspected :D, I have literally spent hours trying to figure out who's wrong, me or the book.
     
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