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Practice QuestionsMCQ (Single Correct Answer)
1
Which one of the following is not classified as pulse modulation?
AP EAPCET 2024 - 22th May Evening Shift
2
The maximum distance between the transmitting and receiving antennas for satisfactory communication in line of sight mode is 57.6 km . If the height of the receiving antenna is 80 m , the height of the transmitting antenna is (radius of earth $=6.4 \times 10^6 \mathrm{~m}$ )
AP EAPCET 2024 - 22th May Morning Shift
3
An information signal of frequency 10 kHz is modulated with a carried wave of frequency $3.62 \mathrm{MHz}^{}$ The upper side and lower side frequencies are
AP EAPCET 2024 - 21th May Morning Shift
4
In amplitude modulation, the amplitude of the carrier wave is 10 V and the amplitude of one of the side bands is 2 V . Then, the modulation index is
AP EAPCET 2024 - 20th May Evening Shift
5
A carrier is simultaneously modulated by two sine waves with modulation indices of 0.3 and 0.4 , then the total modulation index is
AP EAPCET 2024 - 20th May Morning Shift
6
If the maximum and minimum voltages of an $A M$ wave are $V_{\max }$ and $V_{\min }$ respectively. Then, the modulation factor $m$ is
AP EAPCET 2024 - 18th May Morning Shift