Electromagnetic Field Theory
The effective reactance of an inductive coil

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

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Electromagnetic Field Theory
A rectangular waveguide is a

Tube antenna to transmit and receive electromagnetic waves
Hollow rectangular conducting tube through which electromagnetic waves can be propagat-ed
Rectangular conducting wire to propagate electromagnetic waves
Hollow rectangular walled room carrying electromagnetic wave

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