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                                              [Kerala 2002]

A)            Diamagnetic                         

B)            Paramagnetic

C)            Ferri-magnetic                    

D)            Antiferro-magnetic

Correct Answer: A

Solution :

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