Jump to a section

Physics - Communication System

Practise 32 NTA Abhyas (JEE Main) questions on Communication System. Each question shows a quick preview so you can jump straight to the topic you want to revise.

Communication System has been asked in 0 of the 25 years of NTA Abhyas (JEE Main) papers analysed (2002–2026), with 32 questions in all. 100% of them were easy, 0% moderate and 0% tough. Most of its questions came from 2026, with 0 questions that year. In the last three years (2024–2026) it had 0 questions across 49 papers, about 0 per paper.

All of the chapter's questions come from a single topic, Uncategorized.

  1. 1In optical communication systems operating at 1200 nm , only 2 % of the source frequency is available for TV transmission having a bandwidth
  2. 2A carrier wave of peak voltage 12 V is used to transmit a message signal. The peak voltage of the modulating signal in order to have a modul
  3. 3The maximum electron density in the ionosphere in the morning is 10 10 m - 3 . At noon time, it increases to 2 × 10 10 m - 3 . Find the rati
  4. 4The area of the region covered by the TV broadcast, by a TV tower of 100 m height is (Take, the radius of the earth, R e = 6.4 × 10 6 m )
  5. 5The height of a TV antenna is 200 m . The population density is 4000 k m - 2 . Find the population benefited
  6. 6In optical communication system operating at 1200 nm , only 2 % of the source frequency is available for TV transmission having a bandwidth
  7. 7A signal wave of frequency 12 kHz is modulated with a carrier wave of frequency 2.51 MHz. The upper and lower side band frequencies are resp
  8. 8Amplitude modulation is the process of
  9. 9A T.V. tower has a height of 100 m . The population covered by T.V. broadcast is, if the average population density around the tower is 1000
  10. 10Calculate how much population would be covered by T.V. broadcast if height of TV tower is 100 m and the average population density around th
  11. 11An amplitude modulated wave is as given in figure. Calculate the percentage modulation,
  12. 12A TV tower has a height of 150 m . The area of the region covered by the TV broadcast is (radius of earth = 6.4 × 10 6 m )
  13. 13What is the value of frequency at which electromagnetic wave must be propagated for the D-region of atmosphere to have a refractive index of
  14. 14The radius of the Earth is 6400 km . If the height of an antenna is 500 m , then its range is
  15. 15Consider telecommunication through optical fibres. Which of the following statements is not true?
  16. 161 % of 10 12 Hz of a satellite link was used for telephony. The number of channels or subscribers if each channel is of 8 kHz are
  17. 17A bandwidth of 10 M H z is available for A M transmission. If the maximum audio signal frequency used for modulating the carrier is not to e
  18. 18In optical communication systems operating at 1200 nm , only 2 % of the source frequency is available for TV transmission having a bandwidth
  19. 19In optical communication system operating at 1200 nm, only 2% of the source frequency is available for TV transmission having a bandwidth of
  20. 20If the height of TV tower is increased by 21 % , then the transmission range is enhanced by
  21. 21The length of a dipole antenna for a carrier wave of frequency 6 × 10 8 Hz is ( take speed of EM wave 3 × 10 8 m s - 1 )
  22. 22The antenna current of an AM transmitter is 8 A when only the carrier is sent, but it increases to 8 . 93 A when the carrier is modulated by
  23. 23If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be at least equal to
  24. 241000 kHz carrier wave is amplitude modulated by the signal frequency 200 - 4000 Hz . The channel width in this case is
  25. 25The mode of propagation used by short wave broadcast services having a frequency range from a few MHz up to 30 MHz is
  26. 26Minimum length of antenna required to transmit a radio signal of frequency 10 MHz is equal to
  27. 27A radar sends waves towards a distant object and receives the signal reflected by the object. These waves are
  28. 28What is the modulation index of an FM signal having a carrier swing of 100 kHz when the modulating signal has a frequency of 8 kHz ?
  29. 29If the area to be covered for TV telecast is doubled, then the height of transmitting antenna (TV tower) will have to be
  30. 30The glass of optical fibre has a refractive index 1 . 55 and cladding with another glass of refractive index 1 . 51 . When the surrounding m
  31. 31The maximum frequency for reflection of sky waves from a certain layer of the ionosphere is found to be f max = 9 ( N max ) 1 / 2 , where N
  32. 32The antenna current of an AM broadcast transmitter which is modulated by 50 % is 11 A . The carrier current is

Frequently Asked Questions

1.How many questions are available for Communication System?

This chapter includes 32 NTA Abhyas (JEE Main) questions.

2.Are these questions only from NTA Abhyas (JEE Main), or from other exams too?

These are NTA Abhyas (JEE Main) questions specifically for the Communication System chapter. Questions from other exams like JEE Main or JEE Advanced are organised separately under their respective exam sections.

3.What is the difficulty level of Communication System questions in NTA Abhyas (JEE Main)?

Of the 32 questions analysed for this chapter, 100% are easy, 0% moderate and 0% tough. 2026 had the most, with 0 questions.

4.Which topics in Communication System should I focus on?

All of this chapter's questions come from a single topic: Uncategorized.