00:01
In this problem we're given an emf of 93 .5 volts and we're giving that its current on a 4 -oam resistor is 17 amps.
00:29
There are four resistors in this diagram.
00:34
The first one, we don't know what it is.
00:37
The second one is 1 -on -v -3 -1.
00:43
The third one is 2 oms and the fourth one is 4 oms.
00:56
Okay, so we need to find the resistance for each section.
01:02
R1 and r2 are series.
01:08
So to find that resistance, we just add the two numbers.
01:21
Okay.
01:21
These two and r3 are parallel so to find the resistance we do one over and we get one over r plus one ome plus one over two oms and that equals two ome r plus two ome squared divided by r plus three oms the final one of these two and r4 are in series.
02:33
So we add those together...