Correct Answer : Velocity of motion
Explanation : Lightning strikes, ignition systems, motors, electronic circuits and weather create interference signals called noise. They are generally of high frequency and spikes of voltages.
Correct Answer : Option (A) : Bandwidth is higher for binary data than audio signals
Explanation : Since binary data is transmitted in square waves or pulses, they are generally made up of numerous fundamental sine waves. This occupies a huge bandwidth as compared to audio signals which are analog in nature and usually comprise of a lesser number of sine waves.
Correct Answer : Option (D) : 25.75
Explaination : N/S = Frequency deviation by noise / maximum deviation = 156.42/4000 =0.0391S/N = (N/S)-1=25.57.
Correct Answer : Option (C) : 15.366°
Explanation : ?=sin-1(N/S)=sin-1(2/7)=sin-1(0.265)=15.366°.
