Correct Answer : Option (A) : double the highest frequency in audio signal
Explanation : For proper sampling and faithful reproduction sampling frequency must be at least twice the highest frequency in the signal.
Correct Answer : left to right
Correct Answer : Fading
Explanation : Tropospheric scatter propagation is subject to two types of fading called Rayleigh fading (due to multipath propagation) and fading due to variations in atmospheric conditions along the propagation path.
Correct Answer : 13 mm