Communication Systems MCQ Questions & Answers | ECE

A. 12.5

B. 10

C. 7.5

D. 5

A. quadrupled

B. doubled

C. unaltered

D. none of these

A. $$\frac{4}{9}$$

B. $$\frac{1}{2}$$

C. $$\frac{2}{3}$$

D. $$\frac{5}{9}$$

A. 10 W

B. 18 W

C. 20 W

D. 28 W

A. Ensemble average is half of the time average

B. Time average is half of the ensemble average

C. Time average is equal to ensemble average

D. Time average is more than ensemble average

A. $$\frac{{E_c^2}}{{2R}}$$

B. $$\frac{{{m^2}E_c^2}}{{4R}}$$

C. $$\frac{{E_c^2\left( {1 + \frac{{{m^2}}}{2}} \right)}}{R}$$

D. $$\frac{{{m^2}E_c^2}}{{8R}}$$

A. 7.4%

B. 11.11%

C. 4.3%

D. 8.3%

A. A is better scorer and more consistent than B

B. B is better scorer and more consistent than A

C. B is better scorer and less consistent than A

D. A is better scorer and B is more consistent than A

A. Is an undistorted version of the original signal

B. Contains the 6 kHz component and a spurious component of 4 kHz

C. Contains only the 6 kHz components

D. Contains both the components of the original signal and two spurious components of 4 kHz and 10 kHz

A. a high-frequency carrier

B. not modulated

C. a very low-frequency carrier

D. a low-frequency carrier