00:01
This problem, let's see here, we have this simple little circuit here that was shown in the chapter.
00:08
Voltage or power supply here and three resistors all in series.
00:15
And we simply asked what is the potential.
00:20
We find the potential across r2, this resistor here.
00:26
So we're told that this has a 12 -volt power supply battery, that our, that our, we are, 1 is 3 oms, r2 is 4 oms, and r3 is 5 oms.
00:38
So to figure out what the voltage drop across this resistor is, we need to figure out, we need to take i times r.
00:47
So we need to figure out what i is.
00:51
And just because we know these are all in, there's basically only one loop here, so the current is the same in all, in all wires here, and all resistors...