A) \[{{\chi }_{m}}={{\mu }_{r}}+1\]
B) \[{{\chi }_{m}}={{\mu }_{r}}-1\]
C) \[{{\chi }_{m}}=\frac{1}{{{\mu }_{r}}}\]
D) \[{{\chi }_{m}}=3(1+{{\mu }_{r}})\]
Correct Answer: B
Solution :
(b) \[{{\chi }_{m}}={{\mu }_{r}}-1\] Relationship between magnetic susceptibility \[{{\chi }_{m}}\]relative permeability \[{{\mu }_{r}}\] is \[{{\mu }_{r}}=1+{{\chi }_{m}}\] or \[{{\chi }_{m}}={{\mu }_{r}}-1\]
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