00:01
So we're given this circuit, we're given a lot of information about it.
00:03
We want to find the power in each circuit element.
00:07
So i'm going to start out by assigning voltages at various points around the circuit.
00:15
So i'm going to start out by putting a ground in down here so the voltage is zero here.
00:28
And then at this point up here, it's 30 volts because we've gone up 30 from that.
00:37
Of voltage source.
00:41
And then v2 is 12.
00:44
So we subtract 12 from that.
00:47
And we got at this point 18 volts.
00:54
And then v3 and v4 are both 28.
00:59
So we're going to subtract 28 from this.
01:02
And this one here is minus 10 volts.
01:06
And then i0 is 2.
01:12
So that's equal to 10 volts.
01:15
And that's totally consistent with this being zero down here.
01:21
So that tells us what the voltages that our junctions are.
01:26
So now i wanted to do that to make sure that the circuit is as drawn as consistent.
01:36
So mostly i'm labeling them by their voltages, but the current or that dependent voltage source, i'm labeling down here...