Question

A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field. This observation establishes that bismuth is

• A. Diamagnetic
• B. Paramagnetic
• C. Ferromagnetic
• D. Anti-ferromagnetic

Answer 1

The correct option is A Diamagnetic

A rod of diamagnetic material comes to rest with its length perpendicular to the direction of the field when it is suspended in a uniform magnetic field because the field is strongest at the poles and diamagnetic material always tries to move away from strong magnetic field. Therefore, bismuth is diamagnetic in nature.

Hence, ($A)$ is the correct answer.