00:01
So we have a circular conducting loop that we're told is below a wire, even though the drawing has it the opposite way.
00:06
I'm going to go by the wording.
00:08
So it's below a wire that carries a current to the left.
00:12
I'm going to know which of the following choices will induce a current to flow in the loop in a clockwise direction.
00:17
So we want our current inside our loop to go this way.
00:22
So what we need then is if we think about the magnetic field that that produces, a current going clockwise produces.
00:30
A field that goes into the page inside of the loop like this.
00:36
And so what we need to do is decrease the flux inside of the loop.
00:41
Because if we think about the current, the magnetic field from the wire above, when it's underneath the wire, it points out of the page.
00:50
When it's above the wire, it points into the page.
00:53
So we want to have a decreasing current.
00:55
That would be one possibility...