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

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

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Electromagnetic Field Theory
Magnetostriction is a phenomenon of

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

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Electromagnetic Field Theory
Two identical circular coils, one closed and another is little split (not enclosed) are placed in an uniform magnetic field which decrease at a constant rate. If the plane to the coils are perpendicular to the field which of the following statements is true?

 An emf is induced in split coil.
 An emf is induced in both coils.
 Equal joule heating occurs in both coils.
 Joule heating does not occur in each of the coils.

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