Mesh analysis, 2 meshes 1 known current source

  • Thread starter mishima
  • Start date
  • #1
mishima
552
34

Homework Statement


Find i1 in the following figure, given: Vs=10V, I=1A, R1=5, R2=2, R3=4

prob.jpg


Homework Equations


KVL


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.

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
mishima
552
34
I also get the same answer when doing node analysis. I think this is just a book error, not in the errata.
 
  • #3
gneill
Mentor
20,946
2,892
I also get the same answer when doing node analysis. I think this is just a book error, not in the errata.


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

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