A) \[20\pi \times {{10}^{-5}}N{{A}^{-2}}\]
B) \[21\pi \times {{10}^{-5}}N{{A}^{-2}}\]
C) \[22\pi \times {{10}^{-5}}N{{A}^{-2}}\]
D) \[24\pi \times {{10}^{-5}}N{{A}^{-2}}\]
Correct Answer: D
Solution :
(d) \[24\pi \times {{10}^{-5}}N{{A}^{-2}}\] As \[\mu ={{\mu }_{r}}{{\mu }_{0}}\] Here, \[{{\mu }_{r}}=600\] and \[{{\mu }_{0}}=4\pi \times {{10}^{-7}}N{{A}^{-2}}\] \[\therefore \] Magnetic permeability. \[\mu =600\times 4\pi \times {{10}^{-7}}\] \[=24\pi \times {{10}^{-5}}N{{A}^{-2}}\]
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