A vertical bar magnet is dropped through the center of a horizontal loop of wire, with its north pole leading.At the instant when the midpoint of the magnet is in the plane of the loop, the induced current in the loop, viewed from above, is:
A)maximum and clockwise
B)maximum and counterclockwise
C)not maximum but clockwise
D)not maximum but counterclockwise
E)essentially zero

Question

Quizplus · Accepted Answer

At the instant when the midpoint of the magnet is in the plane of the loop, the change in magnetic flux through the loop is minimal because the magnet's influence on the loop is not increasing or decreasing significantly at that instant. Therefore, according to Faraday's Law of electromagnetic induction, the induced current is essentially zero.

A Vertical Bar Magnet Is Dropped Through the Center of a Horizontal