A) \[{{\chi }_{d}}<{{\chi }_{p}}<{{\chi }_{f}}\]
B) \[{{\chi }_{d}}<{{\chi }_{f}}<{{\chi }_{p}}\]
C) \[{{\chi }_{f}}<{{\chi }_{d}}<{{\chi }_{p}}\]
D) \[{{\chi }_{f}}<{{\chi }_{p}}<{{\chi }_{d}}\]
Correct Answer: A
Solution :
[a] \[{{\chi }_{d}}<{{\chi }_{p}}<{{\chi }_{f}}\] For diamagnetic substance \[{{\chi }_{d}}\]is small n negative \[({{10}^{-5}})\] For paramagnetic substances \[{{\chi }_{p}}\]is small and positive \[({{10}^{-3}}\,to\,{{10}^{-5}})\] For ferromagnetic substances \[{{\chi }_{f}}\]is very large \[({{10}^{3}}\,to\,{{10}^{5}})\]
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