Study desk with books and learning tools for subject-based MCQ preparation

Focused topic practice

modulation and demodulation MCQs

Practise focused modulation and demodulation questions with marked answers for exam preparation and subject revision.

modulation and demodulation Mcqs

1. The signal voltage induced in the aerial of a radio receiver is of the order of_____________?
0

A. V

B. mV

C. V

D. None of the above

2. In the above question, what is the power in sidebands ?
0

A. 8 kW

B. 6 kW

C. 06 kW

D. 9 kW

3. The major advantage of FM over AM is__________________?
0

A. Smaller bandwidth

B. Reception is less noisy

C. Small frequency deviation

D. Higher carrier frequency

4. In radio transmission, the medium of transmission is ________________?
0

A. None of the above

B. Cable

C. Space

D. An antenna

5. In TV transmission, sound signal is ______________modulated?
0

A. None of the above

B. Phase

C. Frequency

D. Amplitude

6. The diode detector in an AM radio receiver is usually found _____________?
0

A. After several stages of amplification

B. None of the above

C. After the first RF stage

D. Before the first RF stage

7. In an AM wave useful power is carrier by ______________?
0

A. Carrier

B. Sidebands

C. Both sidebands and carrier

D. None of the above

8. The superhetrodyne principle provides selectivity at ______________stage?
0

A. audio

B. Before RF

C. IF

D. RF

9. The signal voltage induced in the aerial of a radio receiver is of the order of ________________?
0

A. V

B. mV

C. None of the above

D. V

10. In a radio receiver, we generally use .. oscillator as a local oscillator
0

A. Phase-shift

B. Hartley

C. Wien-bridge

D. Crystal

11. As the modulation level is increased, the carrier power__________________?
0

A. Is decreased

B. None of the above

C. Is increased

D. Remains the same

12. Modulation refers to a low-frequency signal controlling the ________________?
0

A. May be any of the above

B. Amplitude of the carrier

C. Frequency of the carrier

D. Phase of the carrier

13. Man made noise are______________ variations?
0

A. Amplitude

B. Frequency

C. Phase

D. Both phase and frequency

14. If level of modulation is increased ______________ power is increased?
0

A. Carrier as well as sideband

B. Carrier

C. Sideband

D. None of the above

15. If a radio receiver amplifies all the signal frequencies equally well, it is said to have high ________________?
0

A. Selectivity

B. Sensitivity

C. Fidelity

D. Distortion

16. If Amin = 40 and Amax = 60, what is the percentage of modulation?
0

A. 20 %

B. 50%

C. 40%

D. 10%

17. In the above question, what is the power in sidebands?
0

A. 9 kW

B. 8 kW

C. 6 kW

D. 06 kW

18. In superhetrodyne receiver, the input at mixer stage is________________?
0

A. IF and RF

B. RF and AF

C. IF and AF

D. RF and local oscillator signal

19. In TV transmission, picture signal is ______________ modulated?
0

A. Amplitude

B. Frequency

C. None of the above

D. Phase

20. Superhertodyne principle refers to_________________?
0

A. None of the above

B. Using a large number of amplifier stages

C. Obtaining lower fixed intermediate frequency

D. Using a push-pull circuit

Showing 1 to 20 of 42 mcqs