00:01
All right, so we have a rectangular loop of wire next to another wire like this, and they're both carrying the same magnitude of the current.
00:12
And the distance between the near side of the wire of the loop and the wire is three centimeters.
00:20
The width of the loop is 0 .5 centimeters, and then the length of the loop is 10 centimeters.
00:29
And we're told that the current going through them is 6 .5 amps.
00:35
And so we want to find the force on the wire.
00:37
So the force is going to be, you know, of a wire in a magnetic field, it's going to be like i times the length vector, cross product with the magnetic field.
00:47
The length vector points in the same direction as the current.
00:50
The magnetic field of this top wire is going to be coming out of the page on this side and then going into the page on this side.
01:02
And so it kind of looks like this, if i could attempt to draw a three -dimensional drawing.
01:08
And, of course, it's the same over on this side of this loop here.
01:12
So the force on the loop we can see is going to be upwards on this side and it's going to be downwards on this side because the current is reversed on the bottom side.
01:23
But the force at the top side is greater than the force on the bottom side.
01:26
So the net force is going to be attracted.
01:29
So the net force on this loop is going to be the current in the loop times the length of the loop...