Electromagnetic Field Theory
MUF is depend upon

Height of ionospheric layer
Received frequency by receiver
Electron density of the ionospheric layer
11 year sun spot cycle

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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

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

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Electromagnetic Field Theory
If an electric current carrying coil is placed in a uniform magnetic field in the direction of magnetic induction, then

 the net force and torque on the coil are both zero.
 the net force is zero but torque is finite.
 the net force is finite but torque is zero.
 the net force and torque are both finite.

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