Question

In the scenario depicted, the loops induce a current due to the changing magnetic field. What direction is the induced current in the loops?

A) Clockwise
B) Counterclockwise
C) No induced current
D) Alternating direction

Answer 1

The induced current in the loops circulates clockwise when a north pole of a magnet moves toward a loop, as this direction opposes the change in magnetic flux in accordance with Lenz's Law.

Step-by-step explanation:

When a north pole of a magnet is moved toward a copper loop, and we are viewing the loop from above, the induced current in the loop circulates in a manner to oppose the change in magnetic flux due to the approaching north pole. According to Lenz's Law, which states that an induced electromotive force (emf) always gives rise to a current whose magnetic field opposes the original change in magnetic flux, the induced current will be circulating clockwise. The approaching north pole creates an increasing magnetic field through the loop, and to counteract this increase, the induced current must create its own magnetic field directed into the page, which occurs when the current circulates clockwise.