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Modulation And Demodulation - Questions and Answers

Practice questions on Modulation And Demodulation.

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1. One of the following of a carrier wave is varied is accordance with the intensity of the signal, in amplitude modulation
A. phase
B. amplitude
C. frequency
D. phase or frequency
Explanation:
2. In a super-hetrodyne receiver, the frequency of input fed to the amplifier circuit is
A. 600 kHz
B. 445 kHz
C. 455 kHz
D. 1055 kHz
Explanation:
3. The type of modulation used in the T.V picture transmission is
A. amplitude modulation
B. phase modulation
C. frequency modulation
D. phase or frequency modulation
Explanation:
4. For effective modulation, the degree of modulation should
A. be small
B. never exceed 100%
C. be large
D. always more than 100%
Explanation:
5. In a frequency modulated wave
A. amplitude varies with the signal
B. frequency varies with the signal
C. amplitude and frequency vary with the signal
D. amplitude and frequency are constant
Explanation:
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