Question

A paramagnetic substance of susceptibility $ 3\times {{10}^{-4}} $ is placed in a magnetic field of $ 4\times {{10}^{-4}}A{{m}^{-1}} $ . Then the intensity of .magnetization in the units of $ A{{m}^{-1}} $ is

• A. $ 1.33\times {{10}^{8}} $
• B. $ 0.75\times {{10}^{-8}} $
• C. $ 12\times {{10}^{-8}} $
• D. $ 14\times {{10}^{-8}} $
• E. $ 1.2\times {{10}^{-8}} $

Answer 1

Answer: (C)

Susceptibility $ (\chi ) $ $ =\frac{intensity\text{ }of\text{ }magnetisation(I)}{magnetic\text{ }field(B)} $
or $ I=\chi B $
$ \therefore $ $ I=3\times {{10}^{-4}}\times 4\times {{10}^{-4}} $
or $ I=12\times {{10}^{-8}}A{{m}^{-1}} $