Question

A soft iron rod X is allowed to fall on the two poles of a U shaped permanent magnet as shown in figure. A coil is wrapped over one arm of the U shaped magnet.

During the fall of the rod, the current in the coil will be:

विकल्प

• clockwise current

• anticlockwise current

• alternating current

• zero

Answer 1

anticlockwise current

Explanation:

As the soft iron rod falls, it enhances the magnetic field between the poles of the U-shaped magnet, generating an increase in magnetic flux through the coil. According to Faraday’s law, a change in magnetic flux causes an electromotive force (EMF) in the coil. By Lenz’s law, the induced current flows in a direction that opposes the increase in flux. When viewed from above, the coil produces an anticlockwise current as a result of creating its own magnetic field in opposition to the expanding magnetic field.