Communication Systems MCQ Questions & Answers | ECE

A. Total hopping bandwidth

B. Instantaneous bandwidth

C. Both A and B

D. None of the above

A. S_AM(t) = A_c[1 + m(t)]cos(2πf_ct)

B. S_AM(t) = A_c[1 + m(t)]sin(2πf_ct)

C. S_AM(t) = A_c[m(t)]cos(2πf_ct)

D. S_AM(t) = A_c[m(t)]sin(2πf_ct)

A. 1250 Hz

B. 2000 Hz

C. 2500 Hz

D. 4000 Hz

A. A_Cm(t)

B. [$${\text{A}}_{\text{C}}^2$$ [1 + K_am(t)]²

C. [A_C|1 + K_am(t)|]

D. A_C|1 + K_am(t)|²

A. 0.5

B. 0.75

C. 0.9

D. 1

A. 28.8 kW

B. 71.2 kW

C. 35.6 kW

D. 36.5 kW

A. 3.2 kHz

B. 9.6 kHz

C. 32 kHz

D. 100 kHz

A. passing through an integrator followed by envelop detection

B. Multiplying with carrier frequency followed by low pass filtering

C. passing through a differentiator followed by envelop detection

D. passing through a voltage controller oscillator (VCO)

A. Less interference and noise

B. More convenient receiver and transmitter

C. Power consumption is less as compared to AM

D. Adjacent FM channels are separated by guard bands

A. Bandwidth

B. Output power

C. Power input

D. None of the above