1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...