Question

A diamagnetic material in the magnetic field moves
A. perpendicular to field
B. from stronger to weaker parts of field
C. from weaker to stronger parts of field
D. None of these

Answer 1

Hint: In order to solve this question, we should know that a magnetic field is the field in space around a magnetic source material in which any other magnetic material can experience the magnetic force and magnetic field lines originate from North pole of source material and ends in to South pole of source material. Here, we will discuss diamagnetic material and its basic properties to find out the correct option about its movement in the magnetic field.

Complete answer:
There are some materials in nature whose atoms have all electrons paired up so that net permanent magnetic moment inside the material is zero and hence they have no intern magnetic field on their own. Such materials are known as Diamagnetic materials.

When diamagnetic materials are placed in the external magnetic field they get magnetized in the direction opposite to that of the external magnetic field.Since, the diamagnetic material is magnetized in the opposite direction of the magnetic field so they will try to reduce the magnetic field in the direction of the magnetic field hence, they start to move from stronger to weaker part of the magnetic field.

Hence, the correct option is B.

Note: It should be remembered that, the most common examples of diamagnetic materials in everyday life are Water, Glass, marble, wood and many more. Beside diamagnetic materials, there are some materials which have their own internal magnetic field due to some net magnetic moment inside their atoms; such materials are known as paramagnetic materials.