Assertion" When diamagnetic material is placed in a non-uniform magnetic Held, it tends to move from stronger to the weaker part of the magnetic field.
Reason: Diamagnetic materials possess strong magnetism.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true and reason is not the correct explanation of assertion.
C. If assertion is ture but reason is false.
D. If both assertion and reason are false.

Answer

C

Explanation

Electrons in an atom orbiting around nucleus possess orbital angular momentum. these electrons are equivalent to current-carrying loop an thus possess orbital magnetic moment. Diamagnetlc substances are the ones in which resultant magnetic moment in an atom is zero. When magnetic field is applied, those electrons having orbital magnetic moment in the same direction slow down and those in the opposite direction speed up. Thus, the substance develops a net magnetic moment in direction opposite to that of the applied field.