A) \[100\,ohm\]
B) \[300\,ohm\]
C) \[450\,ohm\]
D) \[600\,ohm\]
Correct Answer: B
Solution :
Reactance of a coil \[{{X}_{L}}\propto \omega \] \[\therefore \] \[\frac{{{X}_{{{L}_{1}}}}}{{{X}_{{{L}_{2}}}}}=\frac{{{\omega }_{1}}}{{{\omega }_{2}}}\] \[\Rightarrow \] \[\frac{100}{{{X}_{L}}}=\frac{50}{150}\] \[{{X}_{L}}=300\Omega \]
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