Question

question 17 (1 point)
a bar magnet falls through a loop of wire with the north pole entering first. as the north pole enters the wire, the induced current will be (as viewed from above)
zero.
clockwise.
counterclockwise.
to top of loop.

Explanation:

1. Recall Lenz's Law: The induced current will create a magnetic field that opposes the change in magnetic flux.
2. When the north pole of the bar magnet enters the loop, the magnetic flux through the loop (directed downward, into the loop) is increasing.
3. To oppose this increase, the induced magnetic field should be directed upward (out of the loop).
4. Using the right - hand rule (curl fingers in the direction of current, thumb points to magnetic field direction), for a magnetic field out of the loop (viewed from above), the current direction is counterclockwise.

Answer:

counterclockwise.