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Homework Help: Nodal analysis

  1. Apr 14, 2009 #1
    Guys l would like to know how does the the voltage at node D become :

    Vd=-(Vc-Va)=Va-Vc
     

    Attached Files:

  2. jcsd
  3. Apr 15, 2009 #2

    The Electrician

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    Gold Member

    Calculate ix = (VC-VA)/2. You see why this is, I hope. Ask if you don't.

    Then the dependent source feeding VD has a voltage VD =-2*ix. Substituting what we calculated for ix above, we have VD = -2*ix = -2*(VC-VA)/2 = VA-VC.
     
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