question_answer

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) Fern-magnetic

D) Antiferro-magnetic

Correct Answer: A

Solution :

[a] A diamagnetic rod set itself perpendicular to the field it free to rotate between the poles of a magnet as in this situation the field is strongest near the poles.