Question

A piece of a diamagnetic material, free to move when placed in a uniform magnetic field:

• A. moves along the field
• B. moves opposite to the field
• C. moves perpendicular to the field
• D. does not move at all

Hint:

Diamagnetic materials move only in non-uniform magnetic fields where they experience a net repulsive force. In uniform fields, there is no movement.

Answer 1

The Correct Option is D

Diamagnetic materials are repelled by magnetic fields due to an induced magnetic moment opposing the applied field. In a uniform field, the net magnetic force on a diamagnetic object is zero, as it relies on the field's gradient. Consequently, the diamagnetic piece experiences no net force and remains stationary in this uniform field. In a non-uniform field, it would move towards regions of weaker field intensity.