A) 5.4 mH
B) 162 mH
C) 0.006 mH
D) 0.0002 mH
Correct Answer: B
Solution :
\[L=\mu ni\] Þ \[\frac{{{L}_{2}}}{{{L}_{1}}}=\frac{\mu }{{{\mu }_{0}}}\] ( n and i are same) Þ \[{{L}_{2}}={{\mu }_{r}}{{L}_{1}}=900\times 0.18=162\,mH\]
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