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Circuit Analysis - Help please..

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MrNobody

New Member
Hi, I was doing my self study on circuit analysis from the book "Understanding Circuits - Learning Problem Solving Using Circuit Analysis". Below is a question from that book and I just can't seem to get the answer. I've been cracking my head for a while now.. Can comebody please point me the right way on how to calculate Vo..?
Thanks..
 

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MrAl

Well-Known Member
Most Helpful Member
Hi there,

Do you mean you want to know what Vo is? I see VA, VB, VC, but no V in the circuit there.
 

nickagian

Member
The key equations are the following :
-> IC=IB=I1
-> I1=-IA-2mA (1)
-> VA = VB + Vo (VA is also applied across the 2mA-current device) (2)

By substituting the given equations and (1) in (2), you finally get IA = -24mA / 9 (the - means different polarity than the one assumed)

By knowing IA, you also know I1 and using the given equations, by (2) you can find the Vo value!
 

nickagian

Member
Sorry, what is I1..? Which part of the circuit..?
Thanks..

Just a constant! Trying to show that IC and IB can be substituted by the same symbol in the equations. Sorry for not clarifying this! In fact I have written the post in a little hurry, 'cause I'm in work. I hope I haven't done any major mistake.
 
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