00:01
I'm going to work a problem that deals with kirchhoff's voltage law.
00:05
And kirchhoff's voltage law says that around any closed loop, that the sum of the voltage drops is equal to zero.
00:12
In this particular circuit, there are four smaller loops and one big one going around the outside.
00:19
There are also four unknowns, so it's easy enough to solve them.
00:23
And so we just work around.
00:24
I'm going to work around clockwise.
00:27
And they're in the top left.
00:29
If i do that, i have minus v.
00:31
X plus 6 volts minus 4 volts and that's equal to 0 so that yields that v.
00:41
X is equal to 2 volts.
00:43
We'll need that for the dependent voltage source in one of the other loops.
00:49
Then in the bottom left i have minus v sub 1 plus 4 volts plus 6 volts is equal to 0 and therefore v sub 1 equal to 10 volts...