Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

 1.1304 μH.
  113.04 μH.
 37.68 μH.
 3.768 μH.

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Electromagnetic Field Theory
The effective reactance of an inductive coil

 remains same irrespective of the frequency.
 decreases because of stray capacitance as the frequency increases.
 increases because of stray capacitance as the frequency increases.
 none of these.

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