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Communication Systems

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2021
If the sum of the heights of transmitting and receiving antennas in the line of sight of communication is fixed at 160 m , then...
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Q JEE MAIN 2021
A bandwidth of 6 MHz is available for A.M. transmission. If the maximum audio signal frequency used for modulating the carrier wave is not to...
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Q JEE-MAIN 2021
An antenna is mounted on a 400 m tall building. What will be the wavelength of signal of signal that can be radiated effectively by...
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Q JEE MAIN 2021
An amplitude modulated wave is represented by $$ C_m(t)=10(1+0.2 \cos 12560 t) \sin \left(111 \times 10^4 t\right) \text { volts. } $$ The modulating frequency...
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Q JEE MAIN 2019
The wavelength of the carrier waves in a modern optical fiber communication network is close to :
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Q JEE-MAIN 2021
A transmitting antenna at top of a tower has a height of 50 m and the height of receiving antenna is 80 m. What is...
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Q JEE MAIN 2021
The maximum amplitude for an amplitude modulated wave is found to be 12V while the minimum amplitude is found to be 3V. The modulation index...
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Q JEE-MAIN 2021
A carrier wave with amplitude of 250 V is amplitude modulated by a sinusoidal base band signal of amplitude 150 V. The ratio of minimum...
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Q JEE MAIN 2021
A message signal of frequency 20 kHz and peak voltage of 20 volt is used to modulate a carrier wave of frequency 1 MHz and...
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Q JEE-MAIN 2021
In amplitude modulation, the message signal
$...
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