00:01
Okay, we have a circuit that looks like this.
00:02
This is a dependent current source.
00:06
It depends on this current up here.
00:09
Ultimately, we want to find v, which is the voltage between the top and the bottom.
00:14
We're also supposed to calculate some powers.
00:17
So usually the first step is to assign unknown currents to the branches.
00:23
There's only one branch that doesn't already have a current assigned.
00:28
I'm going to call this one over here i1.
00:35
So we have a junction rule that represents basically the whole top wire.
00:44
Or think about it as this ix comes up through the 3 -ohm resistor.
00:54
We can think of it maybe as being what's going on in between here.
00:58
So we've got ix coming in.
01:02
In.
01:03
We also have two amps coming in.
01:07
We have three ix coming in from this source.
01:12
And that has i1 going out.
01:19
So that's our junction rule...