24 JEE Main 2021 Communication System previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 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 TV transmission tower antenna is at a height of 20   m . Suppose that the receiving antenna is at. (i) ground le…
What should be the height of transmitting antenna and the population covered if the television telecast is to cover a r…
For VHF signal broadcasting, _______ km 2 of maximum service area will be covered by an antenna tower of height 30 …
A carrier wave with amplitude of 250     V is amplitude modulated by a sinusoidal base band signal of amplitu…
A message signal of frequency 20   kHz and peak voltage of 20 V is used to modulate a carrier wave of frequency 1…
A carrier signal C ( t ) = 25 sin 2 . 512 × 10 10 t is amplitude modulated by a message signal m ( t ) = 5 sin 1 .…
A bandwidth of 6   MHz is available for A . M . transmission. If the maximum audio signal frequency used for modul…
A transmitting antenna at top of a tower has a height of 50   m , and the height of receiving antenna is, 80  …
An amplitude-modulated wave is represented by, C m ( t ) = 10 ( 1 + 0 . 2 cos 12560 t ) sin 111 × 10 4 t   V…
An antenna is mounted on a 400   m tall building. What will be the wavelength of signal that can be radiated effec…
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