00:01
All right, so let's say we have a magnetic field that is uniform and pointing in the positive x direction like this, and then we have a wire segment in the shape of a triangle where this angle we're told is 30 degrees and the current is going upwards in this segment.
00:19
So this place, this vertex is a and then b and then c.
00:23
So we want to know what is the direction of the magnetic force between or at the segment between c and a.
00:31
So that's this segment.
00:32
So the force is going to be the current times the length of that segment crossed with the magnetic field.
00:38
And so if you point your, if you follow the right hand rule, so we have i and then b is this way, so f is going to be out of the page like that.
00:56
And then part two, we want to know what's the force that acts on the segment a times b.
01:02
So the magnitude of the force is just going to be i times the length of that segment times our magnetic field strength.
01:11
And so that is, so we're told that the length of the hypotenuse is three centimeters and the magnetic field strength is 0 .04 tesla and the current is 5 amps...