Communication Systems PYQs - Last 5 Years
AP EAPCET / Physics / Modern Physics / 17 recent questions
PhysicsModern Physics2021-2025
Practice 17 AP EAPCET Physics questions from Communication Systems. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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2023-2025
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Last 5 Years Communication Systems Questions
Showing 17 of 17 filtered questions.
1Communication Systems
In amplitude modulation, if a message signal of 5 kHz 2 is modulated by a carrier wave of frequency 900 kHz , then the frequencies of the side bands are
MCQ+1 / -02025
2Communication Systems
The heights of tansmitting and receiving antennas are respectively $\frac{1}{20000}$ and $\frac{1}{80000}$ times the radius of the
Earth. The maximum distance between these two antennas for satisfactory communication in line of sight mode i...
Earth. The maximum distance between these two antennas for satisfactory communication in line of sight mode i...
MCQ+1 / -02025
3Communication Systems
If the ratio of the maximum and minimum amplitudes of an amplitude modulated wave is $7: 3$, then the modulation index is
MCQ+1 / -02025
4Communication Systems
If the maximum and minimum amplitudes of a modulated wave are 25 V and 5 V respectively, then the modulation index is
MCQ+1 / -02025
5Communication Systems
Ionosphere acts as a reflector for the frequency range of
MCQ+1 / -02025
6Communication Systems
If in an amplitude modulated wave, the maximum amplitude is 14 V and the modulation index is 0.4 , then the amplitude of the carrier wave is
MCQ+1 / -02025
7Communication Systems
For transmitting a signal of frequency 1000 kHz , the minimum length of the antenna is
MCQ+1 / -02025
8Communication Systems
In amplitude modulation of waves, the maximum amplitude is 30 mV and minimum amplitude is 5 mV , then the modulation index is
MCQ+1 / -02025
9Communication Systems
If the sum of heights of transmitting and receiving antennas in line of sight of communication is ' $h$ ' then the height of receiving antenna, to have the range maximum is
MCQ+1 / -02025
10Communication Systems
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 ear...
MCQ+1 / -02024
11Communication Systems
Which one of the following is not classified as pulse modulation?
MCQ+1 / -02024
12Communication Systems
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
MCQ+1 / -02024
13Communication Systems
A carrier is simultaneously modulated by two sine waves with modulation indices of 0.3 and 0.4 , then the total modulation index is
MCQ+1 / -02024
14Communication Systems
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
MCQ+1 / -02024
15Communication Systems
If the maximum and minimum voltages of an $A M$ wave are $V_{\max }$ and $V_{\min }$ respectively. Then, the modulation factor $m$ is
MCQ+1 / -02024
16Communication Systems
A carrier wave of peak voltage 15 V is used to transmit a message signal. If the modulation index is $60 \%$, then the peak of voltage of the modulating signal is
MCQ+1 / -02023
17Communication Systems
Bandwidth of an optical fibre is
MCQ+1 / -02023