homework help > electrical engineering > electrical engineering q&a board > topic: nodal analysis, need to find vo but what's i3...

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posted by  Subbie on 11/2/2009 1:34:58 PM  |  status: Closed  |  Earned Karma: 0

Nodal Analysis, Need to find Vo but what's I3?

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Electrical Engineering Fundamentals of Electric Circuits (4th) by Alexander, Sadiku 3 6 11/3/2009 at 9:00:00 AM
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posted by Shree_vani(MNK) on 11/2/2009 2:36:09 PM  |  status: Live
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Applying KCL at the node
I1 + I2 + I3 = 0
 6Vo - 72 + 4Vo + 12Vo - 120 = 0
24Vo = 192
Vo = 8V
I3 = (8 - 10) / 2
I3 = - 1A
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posted by Subbie on 11/2/2009 2:46:47 PM  |  status: Live
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But I3 is not between V0 and 10V.... does it change anything?
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posted by Subbie on 11/4/2009 4:07:58 PM  |  status: Live
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and it comes up to 22 Vo = 192, not 24Vo=192... ANYONE CAN HELP ME???
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posted by UD117 on 11/5/2009 4:54:34 PM  |  status: Live
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wow the guy who answered your problem really messed up
when you try to find i3 you make sure it is not combined or added to anything with that key note you can parralel the two resistors so the 4Ω and 6Ω are combined (6)(4)/10=2.4Ω and now you have a 12 V source in series with everything
∴you can add the two voltage sources which is 12-10  =2V
use current dividor which is  which gives you a current of 2/3A
please rate!!!
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