00:01
We have three components here, and we'd like to compute their power.
00:05
Let's see what we've got here.
00:06
I'm going to implicitly say that this is ground.
00:09
So this negative side is ground.
00:10
So then our negative va is equal to 30 volts.
00:14
Means that va is negative 30 volts.
00:16
So this guy should be negative 30 volts.
00:20
And our current is negative 2 amps.
00:21
So we actually have 2 amps flowing this way.
00:26
That's great.
00:28
Our power then is equal to, start out with 30 times 2 is 60 watts.
00:32
And is it being absorbed or supplied? well, the current is flowing from negative to positive.
00:40
Means that the current is taking effort.
00:45
It is taking work.
00:45
That's not the way current wants to flow.
00:47
So this component is supplying its power.
00:54
Here we have a voltage of negative 15 volts.
00:57
Here i'm just going to say this is 15 and this is 0...