AP EAPCET 2024 - 22th May Morning Shift | Communication Systems Question 2 | Physics

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 $=6.4 \times 10^6 \mathrm{~m}$ )

28.8 m

51.2 m

25.6 m

14.4 m

AP EAPCET 2024 - 21th May Morning Shift

MCQ (Single Correct Answer)

-0

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

3650 kHz and 3590 kHz

3620 kHz and 3600 kHz

3610 kHz and 3580 kHz

3600 kHz and 3620 kHz

AP EAPCET 2024 - 20th May Evening Shift

MCQ (Single Correct Answer)

-0

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

0.4

0,6

0.7

0.5

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

A carrier is simultaneously modulated by two sine waves with modulation indices of 0.3 and 0.4 , then the total modulation index is

0.12

0.5

0.7

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