Communication Systems MCQ Questions & Answers | ECE

A. Uniformly distributed over the range -2a to +2a

B. Triangular over the range -2a to 2a

C. Gaussian over the range -∞ to ∞

D. None of the above

A. capacitors are charged to amplitude of FM wave

B. frequency deviations are converted into voltage variations

C. simple diode is employed

D. carrier frequency is doubled

A. $$\frac{{3K}}{{3 + {\omega ^2}}}$$

B. $$\frac{{3K}}{{3 - {\omega ^2}}}$$

C. $$\frac{{6K}}{{9 + {\omega ^2}}}$$

D. $$\frac{{6K}}{{9 - {\omega ^2}}}$$

A. $$F = \frac{{\frac{{{S_i}}}{{{N_i}}}}}{{\frac{{{S_0}}}{{{N_0}}}}}$$

B. $$F = \frac{{\frac{{{S_0}}}{{{N_0}}}}}{{\frac{{{S_i}}}{{{N_i}}}}}$$

C. $$F = \frac{{\frac{{{S_0}}}{{{N_0}}}}}{{\sqrt {\frac{{{S_i}}}{{{N_i}}}} }}$$

D. $$F = \frac{{\frac{{{S_i}}}{{{N_i}}}}}{{\sqrt {\frac{{{S_0}}}{{{N_0}}}} }}$$

A. a-4, b-2, c-1, d-3

B. a-2, b-4, c-1, d-3

C. a-3, b-2, c-1, d-4

D. a-2, b-4, c-3, d-1

A. Amplifier

B. AFC

C. Limiter

D. Detector

A. Coherent detector

B. Envelope detector

C. Ratio detector

D. Discriminator

A. 5

B. 0.5

C. 25

D. 0

A. 710 kHz

B. 705 kHz

C. 700 kHz

D. 790 kHz

A. 3 and 4

B. 2 and 3

C. 1 and 2

D. 1 and 4