Electromagnetic Field Theory
A wire carrying current is bent in the form of a circular loop. Then the magnetic field around each portion of the wire will be

 none of above.
 parallel to the plane of the wire.
 parallel to half portion and perpendicular for the other half.
 perpendicular to the circumference of the wire.

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

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

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