00:01
Alrighty, so we got the problem here that discusses this horizontal power line.
00:06
And the power line has a length of 58 meters, and it carries a current of 2 .2 kilo amps.
00:13
So you can imagine you have your power lines.
00:19
I'm just drawing red here.
00:21
Just imagine this line here.
00:23
And it's going across a bunch of these support lines.
00:28
You know, just your regular standard power line.
00:31
And we could just imagine that this part right here is perfectly horizontal.
00:35
We can imagine that this part right here is a length of 58 meters.
00:42
And of course, we know here that the current, which i will write in red here, current is 2 .2 .0 kilamps.
00:55
All right.
00:57
Now we know that the earth's magnetic field, this location has a magnitude of, we'll write it, b of earth.
01:06
And this is a magnitude, as they say.
01:09
Equal to 5 .00 times 10 to the minus 5 teslas.
01:16
And we know that the field of this location here with the wire or the power line is directed toward the north at an angle of 65 degrees.
01:26
So we're going to call theta equal to 65 degrees here...