A) \[1.33\times {{10}^{8}}\]
B) \[0.75\times {{10}^{-8}}\]
C) \[12\times {{10}^{-8}}\]
D) \[14\times {{10}^{-8}}\]
E) \[1.2\times {{10}^{-8}}\]
Correct Answer: C
Solution :
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 \[I=12\times {{10}^{-8}}A{{m}^{-1}}\]
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