Communication Systems MCQ Questions & Answers | ECE

A. 100 MHz and above with much larger bandwidth than AM

B. 100 MHz and above with much lesser bandwidth than AM

C. Less than 100 MHz with much larger bandwidth than AM

D. Less than 100 MHz with much lesser bandwidth than AM

A. Square law

B. Envelope detector

C. Synchronous detector

D. Phase discrimination method

A. 11.11%

B. 0.25%

C. 4.32%

D. 50%

A. RF amplifier

B. Mixer

C. IF amplifier

D. Detector

A. Adjacent channel frequency

B. Image frequency

C. Gyro frequency

D. Maximum usable frequency

A. Weakening of signal

B. Distortion

C. Strengthening of a signal

D. Excessive carrier power

A. $$\ell n{\mu _{XY}}$$

B. $$\ell n\left( {\frac{{{\mu _{XY}}}}{{{\sigma _X}{\sigma _Y}}}} \right)$$

C. $$\frac{{{\sigma _X}{\sigma _Y}}}{{{\mu _{XY}}}}$$

D. $$\frac{{{\mu _{XY}}}}{{{\sigma _X}{\sigma _Y}}}$$

A. The o/p of the phase comparator

B. The o/p of the low pass filter

C. The VCO output

D. None of these

A. $${{\text{m}}_{\text{y}}} = 2,\,\sigma _{\text{y}}^2 = 1$$

B. $${{\text{m}}_{\text{y}}} = 2,\,\sigma _{\text{y}}^2 = 3$$

C. $${{\text{m}}_{\text{y}}} = 1,\,\sigma _{\text{y}}^2 = 1$$

D. $${{\text{m}}_{\text{y}}} = 3,\,\sigma _{\text{y}}^2 = 3$$

A. 175 W

B. 225 W

C. 250 W

D. 200 W