An inductor stores 16 J of magnetic field energy and dissipates 32 W of thermal energy due to its resistance when an a.c. current of 2 A (rms) and frequency 50 Hz flows through it. The ratio of inductive reactance to its resistance is 
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Given: Magnetic field energy 
, Thermal power dissipated 
.
From energy stored in inductor:
From thermal power dissipated:
Inductive reactance:
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