Question

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material is denoted by${\mu }_d,{\mu }_p,{\mu }_f$ respectively then

• A. ${\mu }_d=0$ and ${\mu }_p\ne 0$
• B. ${\mu }_p=0$ and ${\mu }_f\ne 0$
• C. ${\mu }_d\ne 0$ and ${\mu }_p=0$
• D. ${\mu }_d\ne 0$ and ${\mu }_f\ne 0$

Answer 1

The correct option is A ${\mu }_d=0$ and ${\mu }_p\ne 0$

ANSWER:

Explanation :

$\bullet$ The magnetic moment of ferromagnetic material ${\mu }_f$ is non-zero always.

$\bullet$ Materials having unpaired electrons whose spins do not cancel each other are called paramagnetic. These substances have positive magnetic moments and susceptibilities.

$\bullet$ The magnetic moments of electrons in atom of a diamagnetic material cancel out resulting in ${\mu }_f$ = 0

Therefore ${\mu }_d=0$ and ${\mu }_p\ne 0$

Hence, the correct options is (C)