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

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

ANSWER DOWNLOAD EXAMIANS APP

Electromagnetic Field Theory
Magnetostriction is a phenomenon of

 generation of magnetism in electrical conductors.
 change in physical dimensions of ferromagnetic materials during magnetism.
 generation of electricity in ferromagnetic materials.
 change in permeability of ferromagnetic materials during magnetism.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electromagnetic Field Theory