(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[PLAIN]http://img718.imageshack.us/img718/3519/circuith.png [Broken]

This is a circuit I've simulated in pSpice, I can't get the currents to match up with my hand calculations using mesh analyses. Specifically, I'm not entirely sure how to handle the current source.

2. Relevant equations

Mesh 1 is far left, mesh 2 is the center and mesh the is the far right.

Mesh 1.

[itex]18 = 15i_{1} + 30(i_{1} - i_{2})[/itex]

Mesh 2.

[itex] 0 = 10i_{2} + 20(i_{2} - i_{3}) + 30(i_{2} - i_{1})[/itex]

Mesh 3.

[itex] 30 = 40i_{3} + 20(i_{3} - i_{2}) [/itex]

finally, putting all this in a matrix ( I'm using an online calculator, to eliminate the possibility of an error here, but I do know how to do it by hand ).

I get,

[itex]

i_{1} = 0.407A

[/itex]

[itex]

i_{2} = 0.010A

[/itex]

[itex]

i_{3} =-0.580A

[/itex]

Thanks

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# Homework Help: Mesh Analyses Problem

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