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Physics - Communication System

Practise 51 TS EAMCET previous year questions on Communication System, compiled from papers spanning 2012 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty TS EAMCET tests.

Communication System has been asked in 12 of the 24 years of TS EAMCET papers analysed (2001–2024), with 51 questions in all. 67% of them were easy, 31% moderate and 2% tough. Most of its questions came from 2020, with 8 questions that year. In the last three years (2022–2024) it had 17 questions across 17 papers, about 1 per paper.

The chapter's 3 topics are not weighted equally: Modulation (29 questions, 57%), Communication System (14 questions, 27%), and Propagation of EM Waves (8 questions, 16%) have been asked the most. Modulation has also led over the last five years, with 14 questions. Modulation has produced the most tough questions (1).

  1. 1The radio horizon of a transmitting antenna of height 39.2 m is (Radius of the earth )04 May, 2025 (M)Propagation of EM Waves
  2. 2If the frequencies of the carrier wave and message signal are 1 MHz and 28 kHz respectively, then the frequencies of the side bands are04 May, 2025 (E)Modulation
  3. 3When the receiving antenna is on the ground, the range of a transmitting antenna of height 980 m is (Radius of the earth )03 May, 2025 (M)Propagation of EM Waves
  4. 4The layer of the atmosphere which efficiently reflects high frequency waves particularly at night is03 May, 2025 (E)Propagation of EM Waves
  5. 5For commercial telephonic communication, the frequency range adequate for speech signals is02 May, 2025 (M)Communication System
  6. 6Coaxial cable, a widely used wire medium offers an approximate frequency bandwidth of02 May, 2025 (E)Communication System
  7. 7The process of the loss of strength of a signal while propagating through a medium is11 May, 2024 (M)Propagation of EM Waves
  8. 8The process of the loss of strength of a signal while propagating through a medium is10 May, 2024 (M)Communication System
  9. 9For an amplitude modulated wave, the maximum and minimum amplitudes are found to be 10 V and 2 V respectively. Then the modulation index is10 May, 2024 (E)Modulation
  10. 10The heights of the transmitting and receiving antennas and 33.8 m and 64.8 m respectively. The maximum distance between the antennas for sat09 May, 2024 (M)Modulation
  11. 11A message signal of peak voltage 12 V is used to amplitude modulate a carrier signal of frequency 1.2 MHz . The amplitude of the side bands 09 May, 2024 (E)Modulation
  12. 12An amplitude modulated wave is represented by . Then the modulation index is14 May, 2023 (M)Modulation
  13. 13Consider the following statements regarding digital signals. (i) provide a continuous set of values (ii) represent values as discrete steps 14 May, 2023 (E)Communication System
  14. 14The loss of strength of a signal while propagating through a medium is known as13 May, 2023 (M)Communication System
  15. 15A telephonic communication service is working at a carrier frequency of . Only of it is utilized for transmission. If each channel requires 13 May, 2023 (E)Communication System
  16. 16A message signal of frequency is used to modulate a carrier wave of frequency , then the side band frequencies are12 May, 2023 (M)Modulation
  17. 17The need for modulation is12 May, 2023 (E)Modulation
  18. 18A carrier wave of peak voltage is used to transmit a message signal. What should be the peak voltage of the modulatingsignalinordertohaveamo20 Jul, 2022 (M)Modulation
  19. 19For an amplitude modulated wave, the modulation index is found to be 0.5. If the maximum amplitude is found to be 10.0 V, then the minimum a20 Jul, 2022 (E)Modulation
  20. 20The range of frequency bands used for standard AM broadcast is19 Jul, 2022 (M)Communication System
  21. 21Which of the following statements is NOT true?19 Jul, 2022 (E)Modulation
  22. 22A TV transmission antenna is 40 m tall. How much service area it can cover if the receiving antenna is at the ground level? (radius of the E18 Jul, 2022 (M)Propagation of EM Waves
  23. 23A message signal of frequency 15 kHz is used to modulate a carrier of frequency v c . If the side bands produced are 1515 kHz and 1485 kHz ,18 Jul, 2022 (E)Communication System
  24. 24For an amplitude modulated wave, the maximum amplitude is found to be while the minimum amplitude is found to be . The modulation index is06 Aug, 2021 (M)Modulation
  25. 25A TV transmission tower of height covers a range of distance . By how much will be the range change, if the height is increased to06 Aug, 2021 (E)Propagation of EM Waves
  26. 26The length of germanium rod is 0 . 928 cm and its area of cross-section is 1 mm 2 . If for germanium n i = 2 . 5 10 19 m - 3 , h = 0 . 15 m 05 Aug, 2021 (M)Modulation
  27. 27Identify the logic gate for which the output is 0 , when any of the inputs is 105 Aug, 2021 (E)Modulation
  28. 28If the temperature of the semi-conductor is increased, which of the following is correct statement?04 Aug, 2021 (M)Modulation
  29. 29A signal of, 20 kHz is being carried on a carrier wave of 3 MHz . What are the side-band frequencies?04 Aug, 2021 (E)Communication System
  30. 30The function of a detector is to demodulate the modulated carrier wave and the steps for this process are14 Sep, 2020 (M)Modulation
  31. 31A message signal of frequency and peak voltage of is used to modulate a carrier of frequency and peak voltage . The modulation index is14 Sep, 2020 (E)Modulation
  32. 32A message signal is super-imposed with a carrier signal. The resulting modulating signal is given by where . The modulation index and the an11 Sep, 2020 (M)Modulation
  33. 33The electromagnetic waves of frequency are used in11 Sep, 2020 (E)Communication System
  34. 34A message signal of frequency and peak voltage of is used to modulate a carrier frequency of and peak voltage of . Determine the modulation 10 Sep, 2020 (M)Modulation
  35. 35Assertion (A) Television signals are received through sky-wave propagation. Reason (R) The ionosphere reflects electromagnetic waves of freq10 Sep, 2020 (E)Communication System
  36. 36Which of the following statements is incorrect?09 Sep, 2020 (M)Modulation
  37. 37The modulation index used in amplitude modulation of a message signal of peak voltage is 0.5 . By how much the peak voltage of the carrier s09 Sep, 2020 (E)Modulation
  38. 38A message signal is used to modulated a carrier signal of frequency and peak voltage of . In the process, two side-bands are produced sepera06 May, 2019 (M)Modulation
  39. 39A transmitting antenna has a height . What will be the height of receiving antenna, if the maximum distance between them for satisfactory co04 May, 2019 (M)Modulation
  40. 40Carrier waves are used for communicating signals over long distance, because04 May, 2019 (E)Communication System
  41. 41A message signal is used to modulate a carrier frequency. If the peak voltages of message signal and carrier signals are increased by and re03 May, 2019 (M)Modulation
  42. 42In a transistor circuit, the collector current is changed by 89 mA , if the emitter current is changed to 9 . 0 mA . The value of current am03 May, 2019 (E)Communication System
  43. 43For a television network, channels are granted. If the central frequency of the microwave link is and the alloted bandwidth for each channel07 May, 2018 (M)Communication System
  44. 44A transmitting and receiving antenna have height of metres each. The maximum distance between them for satisfactory communication in Line-of05 May, 2018 (M)Propagation of EM Waves
  45. 45The height of a transmission antenna is and that of the receiving antenna is . What should be the maximum distance between them for line of 05 May, 2018 (E)Modulation
  46. 46A person tries to broadcast with the same antenna both the signals at and . If the receiver at some distance has to receive an equal strengt04 May, 2018 (E)Modulation
  47. 47An amplitude modulated signal consists of a message signal of frequency and peak voltage of , modulating a carrier frequency of and peak vol2017Modulation
  48. 48A message signal of and peak voltage is used to modulate a carrier wave frequency and peak voltage . Then, the modulation index is2016Modulation
  49. 49A carrier wave of peak voltage is used to transmit a signal. If the modulation index is , the peak voltage of the modulating signal is2015Modulation
  50. 50A TV transmitting antenna is , tall. If the receiving antenna is at the ground level, the maximum distance between, them for satisfactory co2014Modulation

Frequently Asked Questions

1.How many questions are available for Communication System?

This chapter includes 51 questions compiled from TS EAMCET papers spanning 2012 to 2025.

2.Are these questions only from TS EAMCET, or from other exams too?

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

3.Is Communication System an important chapter for TS EAMCET Physics?

Communication System has appeared in 13 of the 25 years of TS EAMCET papers covered here, with 51 questions across 51 papers - about one per paper it appears in.

4.What is the difficulty level of Communication System questions in TS EAMCET?

Of the 51 questions analysed for this chapter, 67% are easy, 31% moderate and 2% tough. 2020 had the most, with 8 questions.

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

These topics have carried the most weightage in Communication System:

  • Modulation - 29 questions (57%)
  • Communication System - 14 questions (27%)
  • Propagation of EM Waves - 8 questions (16%)
  • Modulation has produced the most tough questions (1).
6.Is Communication System's weightage in TS EAMCET going up or down?

Across all 51 papers analysed, Communication System has averaged about 1.0 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.