13 JEE Main 2019 Communication System previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2019 previous-year questions from the Communication System chapter of Physics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Communication System chapter hub.
A 100 V carrier wave is made to vary between 160   V and 40   V by a modulating signal. What is the modulatio…
A TV transmission tower has a height of 140   m and the height of the receiving antenna is 40   m . What is t…
In a line of sight radio communication, a distance of about 50   km is kept between the transmitting and receiving…
The wavelength of the carrier waves in a modern optical fiber communication network is close to:
A signal A c o s ω t is transmitted using ν 0 s i n ω 0 t as carrier wave. The correct amplitude modulat…
In a CE transistor amplifier, the audio signal voltage across the collector resistance of 2 kΩ is 2 V , if the base res…
An amplitude modulated signal is plotted below: Which one of the following best describes the above signal?
The physical sizes of the transmitter and receiver antenna in a communication system are:
The modulation frequency of an A M radio station is 250 k H z , which is 10 % of the carrier wave. If another A M stati…
A message signal of frequency 100   M H z and peak voltage 100   V is used execute amplitude modulation on a…
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