Q. If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by μd, μp and μf respectively, then :
A) μd ≠ 0 and μf ≠ 0
B) μp = 0 and μf ≠ 0
C) μd = 0 and μp ≠ 0
D) μd ≠ 0 and μp = 0
Explanation
[Solution from source] Atoms of diamagnetic substances have no net permanent dipole moment, while atoms of paramagnetic and ferromagnetic substances do. So μd = 0 and μp ≠ 0; any option with μd ≠ 0 or μp = 0 is wrong. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.