00:01
So we have this circuit.
00:02
When i look at it, i notice that there's a lot of the nodes that are connected together.
00:12
And that tells me that i can probably redraw this circuit so it looks simpler.
00:21
Okay, so let's look at this.
00:23
So this node, this node, and this one all are at the same potential.
00:29
Potential.
00:31
This one, this one, this one, and this one, and then this.
00:51
So instead of having 15 nodes, i have five.
00:57
So i should be able to draw this circuit in a way that it's much simpler.
01:03
So now i'm going to go through and number the resistors so we can pay attention to which one's which when we redraw it.
01:37
Let's make an observation.
01:39
If i look at resistors numbers 3 and 15, they're both 12k, but this point up here in the up to the upper left of number 3 is connected to junction 2, and the one down here at the bottom of number 15 is also junction number 2.
01:58
These two things are in series, they're going to have the same current, except for the fact that both ends of that series resistor are at the same potential.
02:09
So that means that this branch of the circuit, we can completely ignore it, because it's not going to have any current...