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

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

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Electromagnetic Field Theory
The wave in wave guide has

Diminishing wavelength than in the free space
Larger frequency than in the free space
Larger wavelength than in the free space
Group velocity inversely proportional to wavelength

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