Modulation And Demodulation - Study Mode

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[#1] Man made noise are ___________ variations.

(A) Amplitude

(B) Frequency

(C) Phase

(D) Both phase and frequency

Correct Answer

(A) Amplitude

[#2] In TV transmission, picture signal is ___________ modulated

(A) Frequency

(B) Phase

(C) Amplitude

(D) None of the above

Correct Answer

(C) Amplitude

[#3] In TV transmission, sound signal is ___________ modulated

(A) Amplitude

(B) Frequency

(C) Phase

(D) None of the above

Correct Answer

(B) Frequency

[#4] Most of the amplification in a superhetrodyne receiver occurs at ___________ stage

(A) IF

(B) RF amplifier

(C) Audio amplifier

(D) Detector

Correct Answer

(A) IF

[#5] The superhetrodyne principle provides selectivity at ___________ stage

(A) RF

(B) IF

(C) audio

(D) Before RF

Correct Answer

(B) IF