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EE AND ECE - Modulation and Demodulation MCQs
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EE AND ECE - Modulation and Demodulation MCQs
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25 Questions

1. The superhetrodyne principle provides selectivity at ………. stage
2. Modulation is done in …………..
3. In the above question, what is the power in sidebands?
4. In amplitude modulation, the ………… of carrier is varied according to the strength of the signal.
5. Modulation refers to a low-frequency signal controlling the …………
6. In an AM wave, the majority of the power is in …………….
7. If modulation is 100% then signal amplitude is ………….. carrier amplitude
8. The function of ferrite antenna is to …………….
9. In TV transmission, sound signal is ………………… modulated
10. The letters AVC stand for …………..
11. The major advantage of FM over AM is …………..
12. In radio transmission, the medium of transmission is ……………..
13. In superhetrodyne receiver, the input at mixer stage is ……….
14. In a TRF radio receiver, the RF and detection stages are tuned to …………
15. Superhertodyne principle refers to
16. In amplitude modulation, bandwidth is ……………. the audio signal frequency
17. In a radio receiver, we generally use ………….. oscillator as a local oscillator
18. Overmodulation results in …………..
19. The signal voltage induced in the aerial of a radio receiver is of the order of …………….
20. In a transmitter ……………. oscillator is used
21. In India, ……………. modulation is used for radio transmission
22. A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation?
23. In TV transmission, picture signal is ……………… modulated
24. Overmodulation (amplitude) occurs when signal amplitude is …………. carrier amplitude
25. Man made noise are …………. variations.

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