Question

A diamagnetic substance is brought, one by one, near the north pole and the south pole of a bar magnet. It is:

• A. repelled by north pole and attracted by south pole
• B. attracted by north pole and repelled by south pole
• C. attracted by north pole as well as by south pole
• D. repelled by north pole as well as by south pole

Hint:

Diamagnetic substances create an induced magnetic field that opposes the external magnetic field, leading to repulsion.

Answer 1

The Correct Option is D

A diamagnetic substance is a material that creates an opposing magnetic field when exposed to an external magnetic field. This means that diamagnetic substances are repelled by magnets. Here's why:

1. Nature of Diamagnetism: Diamagnetic materials have no unpaired electrons, and their atomic moments generally cancel out. When placed in a magnetic field, they develop an induced magnetic moment that opposes the applied field.

2. Response to Magnetic Poles: Due to their opposition to the applied magnetic field, diamagnetic substances are repelled by both the north and south poles of a magnet. This is because they tend to move from stronger to weaker parts of the magnetic field.

3. Experimental Observation: When a diamagnetic substance is brought near a bar magnet, it experiences a force that pushes it away from both poles.

Considering the behavior of diamagnetic materials, the correct answer is: "repelled by north pole as well as by south pole".