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Real Quick ECE Mesh Analysis Questions

Originally posted by: iamtrout
Here's the first problem.

http://img471.imageshack.us/img471/3576/ecehmwk7gz.jpg

I got the mesh equations and mesh currents.

What does he mean by "Determine relevant branch current"? Aren't there many branch currents? What's the criteria for it to be "relevent"?

And what's the "dependent voltage source" and why? Is it the Vo? What about the -3Vo?

TIA
Click to expand...

The relevant branch current is the current through the 3 ohm resistor, because that determines Vo.

The dependent voltage source "depends" on the voltage across the 3 ohm resistor. If this seems a bit trite, then understand that it is leading up to transistors, which are voltage dependent current sources.
 
Hmm.. usually it asks you for a specific branch current, but I think if you found the values for the currents you specified you should be good.

The dependent voltage source is the diamond-shaped voltage source at the top, with a voltage of -3Vo. It's the dependent voltage source because its dependent on the voltage Vo for its voltage.

So basically find the power P=IV for the diamond-source on the top, and its sign (- or +) will determine if power is absorbed or supplied.
 
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