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Homework Help: Electrical Circuits

  1. Feb 2, 2012 #1
    1. The problem statement, all variables and given/known data
    I need to find the thevinin equivalent for points AB.

    3. The attempt at a solution
    I know the Is current is splitting equally between R1 and R3, but doesnt go to R2 because of the dependent current source.
    so i thought that through:
    I(R5) = Is
    and I(R3)=Is/2
    so the Vab=-3/2*IS*R
    but this is wrong.
    where is my mistake?
    thanks!
     

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  3. Feb 4, 2012 #2

    rude man

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    Homework Helper
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    1. Let Ig = 0, put V1 across RLand compute i. Then thevenin Req = V1/i.

    2. Restore Ig, compute V across RL. Thevenin current source then is V/Req.
     
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