Electromagnetic Field Theory
Conductor is constant and field is varying then emf will be induced. This principle is called

 virtually induced emf.
 dynamically induced emf.
 static induced emf.
None of these

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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

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

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