question_answer

A paramagnetic material has\[{{10}^{28}}\,\,atoms/{{m}^{3}}\]. Its magnetic susceptibility at temperature 350 K is \[2.8\times {{10}^{-4}}.\] Its susceptibility at 300 K is-                  [JEE Main 12-Jan-2019 Evening]

A) \[3.267\times {{10}^{-4}}\]

B) \[3.672\times {{10}^{-4}}\]

C) \[2.672\times {{10}^{-4}}\]

D) \[3.726\times {{10}^{-4}}\]

Correct Answer: A

Solution :

[a] For a paramagnetic material,