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Mesh analysis, 2 meshes 1 known current source

  1. Feb 23, 2013 #1
    1. The problem statement, all variables and given/known data
    Find i1 in the following figure, given: Vs=10V, I=1A, R1=5, R2=2, R3=4

    prob.jpg

    2. Relevant equations
    KVL


    3. The attempt at a solution
    Applying KVL to mesh 1:
    Vs-i1R1-(i1-i2)R3=0
    and i2=I=1A
    So,
    i1=(Vs+i2R3)/(R1+R3)=(10+1*4)/(5+4)=14/9=1.56 A

    But book gives answer as 1.71 A.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 23, 2013 #2
    I also get the same answer when doing node analysis. I think this is just a book error, not in the errata.
     
  4. Feb 23, 2013 #3

    gneill

    User Avatar

    Staff: Mentor


    Looks like a book error; I agree with your result.
     
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