A) \[5500\times {{10}^{7}}\]
B) \[5500\times {{10}^{-7}}\]
C) \[5501\]
D) \[5499\]
Correct Answer: D
Solution :
Relative permeability of iron\[{{\mu }_{r}}=5500\] The relation between relative permeability and magnetic susceptibility is given by \[{{\mu }_{r}}=1+{{\chi }_{m}}\] (where\[{{\chi }_{m}}\] is the magnetic susceptibility) \[5500=1+{{\chi }_{m}}\] \[{{\chi }_{m}}=5500-1\] \[=5499\]
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