A Best Way To Crack Gorenment Job Exams

Electronics Engineering Objective Questions { Digital Communication System }

127. Cosmic noise is caused by
A. distant stars
B. lightning discharge
C. solar eruptions
D. none of the above
Discuss in Forum

128. Probability density function of thermal noise is
A. Poisson
B. Binomial
C. Gaussian
D. None of the above
Discuss in Forum

129. The autocorrection function of the white noise is
A. impulse function
B. step function
C. constant
D. none of the above
Discuss in Forum

130. Frequency shift keying is used mostly in
A. telephony
B. telegraphy
C. radio transmission
D. none of the above .
Discuss in Forum

131. Thermal noise power is
A. proportional to B
B. proportional to 1/F3
C. proportional to 1/B2
D. proportional to B2
Discuss in Forum

132. If the sampling time is less than the Nyquist interval, then
A. guard time reduces
B. bandwidth increases
C. simpler filters may be used to obtain the original signal
D. channel capacity increases
Discuss in Forum

133. In order to get the original signal from the sampled signal, which of the following filters should be necessarily used?
A. Band stop filter
B. Low pass filter
C. High pass filter
D. Band pass filter
Discuss in Forum

Page 19 of 37

« 17 18  19  2021 »