1000+ Communication System Objective Questions and Answers Pdf - 1

Question: 1

Addition of two periodic signals will always be

(A) periodic

(B) aperiodic

(C) may or may not be periodic

(D) insufficient data

Question: 2

The value of resistor creating thermal noise is doubled. The noise power generated is therefore

(A) doubled

(B) halved

(C) quadrupled

(D) unchanged

Question: 3

The trigonometric Fourier series of a periodic time function can have only

(A) d.c. and consine terms

(B) consine and sine terms

(C) sine terms

(D) consine terms

Question: 4

The power spectral density of a real valued random process ______ is function of frequency.

(A) neither an even nor an odd

(B) an even

(C) an odd

(D) none of the above

Question: 5

Communication is the process of

(A) entertainment by electronics

(B) exchanging information

(C) broadcasting

(D) keeping in touch