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

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Electromagnetic Field Theory
In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include

Antenna replacement and feed correction
Path diversity and frequency diversity
Amplitude timing and phase correction
Polarization shifting and code diversity

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