Electromagnetic Field Theory
Which of the following statement regarding waveguides is incorrect?

At waveguide can be coupled to a coaxial cable
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides can handle large power at UHF and microwaves

ANSWER DOWNLOAD EXAMIANS APP

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.

ANSWER DOWNLOAD EXAMIANS APP