00:01
All right, the first part of this problem, part a, wants you define the direction of the current, of the induced current.
00:10
So the right -hand rule basically says that the direction of the induced current follows the direction of the magnetic field and that the current, the loop of wire curls around to point towards the direction of the magnetic field.
00:32
So here is the y -axis, here is x -axis, and here is x -axis, which is pointing out of the board.
00:39
And so magnetic field, b, is pointing out of the board or out of the page, whatever have you.
00:49
It's pointing this way.
00:50
So current must curl around to point out this way.
00:54
And you can use your right hand to really, with the direction of magnetic field, being the thumb, you can see that your fingers curl around like this.
01:06
So current goes around like this.
01:10
And this is of course counterclockwise or anti -clockwise.
01:14
So that's the answer for part a direction of current induced is counterclockwise.
01:19
Because direction of magnetic field is out of the page.
01:23
For part b, rate of energy dissipation would find power.
01:27
And for power you need current...