Electromagnetic Field Theory
The effective reactance of an inductive coil

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

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Electromagnetic Field Theory
A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at

 lower surface of the conductor.
 midway between the conductor and ground.
 the ground surface.
 upper surface of the conductor.

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Electromagnetic Field Theory
Which of following is true for a purely inductive circuit ?

 Apparent power of the circuit is zero.
 Actual power of the circuit is zero.
 Any capacitance even if present in the circuit will not be charged.
 Reactive power of the circuit is zero.

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