Modulation And Demodulation MCQ Questions & Answers | Electrical Engineering Page-3 section-1

21.
A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation?

A. 50 kW

B. 5 kW

C. 8 kW

D. 25 kW

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22.
The major advantage of FM over AM is ___________

A. Reception is less noisy

B. Higher carrier frequency

C. Smaller bandwidth

D. Small frequency deviation

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23.
In an AM wave, the majority of the power is in ___________

A. Lower sideband

B. Upper sideband

C. Carrier

D. None of the above

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24.
As the modulation level is increased, the carrier power ___________

A. Is increased

B. Remains the same

C. Is decreased

D. None of the above

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25.
Modulation refers to a low-frequency signal controlling the ___________

A. Amplitude of the carrier

B. Frequency of the carrier

C. Phase of the carrier

D. May be any of the above

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26.
In a radio receiver, noise is generally developed at ___________

A. IF stage

B. Receiving antenna

C. Audio stage

D. RF stage

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27.
The diode detector in an AM radio receiver is usually found ___________

A. Before the first RF stage

B. After the first RF stage

C. After several stages of amplification

D. None of the above

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28.
The function of ferrite antenna is to ___________

A. Reduce stray capacitance

B. Stabilise d.c. bias

C. Increase the Q of tuned circuit

D. Reduce noise

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29.
If Amin = 40 and Amax = 60, what is the percentage of modulation?

A. 20%

B. 40%

C. 50%

D. 10%

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30.
The signal voltage induced in the aerial of a radio receiver is of the order of ___________

A. mV

B. µV

C. V

D. None of the above

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Modulation And Demodulation MCQ Questions & Answers | Electrical Engineering

21. A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation?

Answer & Solution

22. The major advantage of FM over AM is ___________

Answer & Solution

23. In an AM wave, the majority of the power is in ___________

Answer & Solution

24. As the modulation level is increased, the carrier power ___________

Answer & Solution

25. Modulation refers to a low-frequency signal controlling the ___________

Answer & Solution

26. In a radio receiver, noise is generally developed at ___________

Answer & Solution

27. The diode detector in an AM radio receiver is usually found ___________

Answer & Solution

28. The function of ferrite antenna is to ___________

Answer & Solution

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

Answer & Solution

30. The signal voltage induced in the aerial of a radio receiver is of the order of ___________

Answer & Solution

21.
A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation?

22.
The major advantage of FM over AM is ___________

23.
In an AM wave, the majority of the power is in ___________

24.
As the modulation level is increased, the carrier power ___________

25.
Modulation refers to a low-frequency signal controlling the ___________

26.
In a radio receiver, noise is generally developed at ___________

27.
The diode detector in an AM radio receiver is usually found ___________

28.
The function of ferrite antenna is to ___________

29.
If Amin = 40 and Amax = 60, what is the percentage of modulation?

30.
The signal voltage induced in the aerial of a radio receiver is of the order of ___________