Question

A sample of paramagnetic material is located very close to a bar magnet, in a region in which the field of the magnet appears almost uniform over small distances. If the magnet is suddenly pulled away from the sample so that the sample is no longer in the quasi-uniform region of the magnetic field, how will the sample respond? a) the sample will accelerate towards the magnet b.) the sample will move toward the magnet at constant speed c.) the sample will accelerate away from the magnet d.) the sample will remain at rest

Answer 1

A paramagnetic sample means it has the property to get magnetized as per the external magnetic field and here the external magnetic field is the magnetism applied by the bar magnet.Sudden removal of the bar magnet means the removal of external magnetic field for the paramagnetic material.But we know that paramagnetic material alway get magnetized in the same direction as the external magnetic field .so due to removal the paramagnetic material also get moved toward the bar magnet as both have same direction of magnetism .so option a is correct ,the paramagnetic material will accelerate towards the bar magnet .