Verified Solution • 2025–26 Session moderate

QAIPMT-2005-Ph-2527: NEET 2005 Physics - Class 12 AIPMT-2005-Ph-2527 Solution: If the magnetic dipole moment of an atom of diamagnetic…

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by

\mu_d

\mu_p

and

\mu_f

respectively, then

Multiple Choice Options

A $\mu_d=0$ and $\mu_p\neq0$
B $\mu_d\neq0$ and $\mu_p=0$
C $\mu_p=0$ and $\mu_f\neq0$
D $\mu_d\neq0$ and $\mu_f\neq0$ .

Step-by-Step Verified Solution

The magnetic dipole moment of diamagnetic material is zero as each of its pair of electrons have opposite spins, i.e., _ d = 0. Paramagnetic substances have dipole moment > 0, i.e. _ p � 0, because of excess of electrons in its molecules spinning in the same direction. Ferro-magnetic substances are very strong magnets and they also have permanent magnetic moment, i.e. _ f � 0.

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