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Physics - Waves and Sound

Practise 126 AP EAMCET previous year questions on Waves and Sound, compiled from papers spanning 2001 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 AP EAMCET tests.

Waves and Sound has been asked in 23 of the 24 years of AP EAMCET papers analysed (2001–2024), with 126 questions in all. 37% of them were easy, 47% moderate and 16% tough. Most of its questions came from 2018, with 14 questions that year. In the last three years (2022–2024) it had 26 questions across 28 papers, about 0.9 per paper.

The chapter's 10 topics are not weighted equally: Doppler’s Effect (25 questions, 20%), Vibration of String (24 questions, 19%), and Basics of Mechanical Waves (23 questions, 18%) have been asked the most. Over the last five years the most frequent topics have been Basics of Mechanical Waves (12), Organ Pipe (Vibration of Air Column) (8), and Speed of Sound Waves (6). Doppler’s Effect has produced the most tough questions (11).

  1. 1A sound wave of frequency 500 Hz travels between two points X and Y separated by a distance of 600 m in a time of 2 s. The number of waves b27 May, 2025 (M)Travelling Waves
  2. 2When both source of sound and observer approach each other with a speed equal to of the speed of sound, then the percentage change in freque26 May, 2025 (M)Doppler’s Effect
  3. 3The equation of a transverse wave propagating along a stretched string of length 80 cm is , here ' x ' and ' y ' are in cm and the time ' t 26 May, 2025 (E)Basics of Mechanical Waves
  4. 4If a travelling wave is given by , where and are in metre, the time is in second, then the frequency of the wave is24 May, 2025 (M)Travelling Waves
  5. 5In a closed organ pipe, the number of nodes formed in fifth and ninth harmonics are respectively23 May, 2025 (M)Organ Pipe (Vibration of Air Column)
  6. 6If two progressive sound waves represented by and (where displacement is in metre and time is in second) superimpose, then the time interval23 May, 2025 (E)Beats
  7. 7A steel wire of length 81 cm has a mass of . If the wire is under a tension of 50 N, then the speed of transverse waves on the wire is22 May, 2025 (M)Basics of Mechanical Waves
  8. 8When a stretched wire of fundamental frequency is divided into three segments, the fundamental frequencies of these three segments are and r22 May, 2025 (E)Vibration of String
  9. 9Two sound waves of wavelengths 99 cm and 100 cm produce 10 beats in a time of t seconds. If the speed of sound in air is , then the value of21 May, 2025 (M)Beats
  10. 10The speed of a stationary wave represented by the equation is (In the given equation and are in metre and is in second)21 May, 2025 (E)Basics of Mechanical Waves
  11. 11The frequency of fifth harmonic of a closed pipe is equal to the frequency of third harmonic of an open pipe. If the length of the open pipe23 May, 2024 (M)Organ Pipe (Vibration of Air Column)
  12. 12The vibrations of four air columns are shown below. The ratio of frequencies is22 May, 2024 (M)Organ Pipe (Vibration of Air Column)
  13. 13The fundamental frequency of an open pipe is 100 Hz . If the bottom end of the pipe is closed and of the pipe is filled with water, then the22 May, 2024 (E)Organ Pipe (Vibration of Air Column)
  14. 14A car sounding a horn of frequency 1000 Hz passes a stationary observer. The ratio of frequencies of the horn noted by the observer before a21 May, 2024 (M)Doppler’s Effect
  15. 15If the frequency of a wave is increased by , then the change in its wavelength is (medium not changed)20 May, 2024 (M)Travelling Waves
  16. 16A pipe with 30 cm Length is open at both ends, which harmonic mode of the pipe resonates a 1.65 kHz source? (Velocity of sound in air )20 May, 2024 (E)Organ Pipe (Vibration of Air Column)
  17. 17The speed of a wave on a string is when the tension is 120 N . The percentage increase in the tension in order to raise the wave speed by is19 May, 2024 (E)Basics of Mechanical Waves
  18. 18Two stretched strings A and B when vibrated together produce 4 beats per second. If the tension applied to the string A increased, the numbe18 May, 2024 (M)Beats
  19. 19During the propagation of a longitudinal wave, in the region of compressions and rarefactions19 May, 2023 (M)Basics of Mechanical Waves
  20. 20The mass of one mole of a gas is and its specific heat ratio is 1.6. The speed of sound in the gas at STP is nearly18 May, 2023 (M)Speed of Sound Waves
  21. 21The equation of a stationary wave is , where are in metre and is in second. The distance between a node and its adjacent antinode is18 May, 2023 (E)Stationary waves
  22. 22The ratio of radii of two wires is and the density of their materials are in the ratio . If same tension is applied to both the wires then t17 May, 2023 (M)Basics of Mechanical Waves
  23. 23A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance between then. The wavelength of the standing wa17 May, 2023 (E)Stationary waves
  24. 24The amplitude of a wave, represented by displacement equation will be16 May, 2023 (M)Interference and Superposition of Waves
  25. 25Beats are produced by frequencies and . The duration of time between two successive minima is16 May, 2023 (E)Beats
  26. 26Small amplitude progressive wave in a stretched string has a speed of , and frequency . The phase difference between two points apart on the15 May, 2023 (M)Travelling Waves
  27. 27A string of length ' ' is stretched by and the speed of transverse waves along it is ' '. The speed of wave when it is stretched by will be 15 May, 2023 (E)Basics of Mechanical Waves
  28. 28An open air pipe of length has the second harmonic frequency equal to the fundamental frequency of a closed organ air pipe. The length of th08 Jul, 2022 (M)Organ Pipe (Vibration of Air Column)
  29. 29Two wires and of lengths in the ratio and masses in the ratio are stretched by same tension. The ratio of the fundamental frequencies of wir08 Jul, 2022 (E)Vibration of String
  30. 30Two trains and are moving towards each other with speeds and respectively. The train whistles at frequency. Before the trains meet, frequenc07 Jul, 2022 (M)Speed of Sound Waves
  31. 31A string of length and mass is put under a tension of . A wave of frequency is sent along it. The speed of this wave is06 Jul, 2022 (M)Vibration of String
  32. 32Two open organ pipes of lengths and are totally immersed in a medium. They are found to give 40 beats in when each is sounding at its fundam06 Jul, 2022 (E)Organ Pipe (Vibration of Air Column)
  33. 33Two cars are moving towards each other at the speed of . If one of the cars blows a horn at a frequency of , the wave length of the sound pe05 Jul, 2022 (M)Doppler’s Effect
  34. 34Among the following, the equation representing a progressive wave is (A) (B) (C) (D)05 Jul, 2022 (E)Basics of Mechanical Waves
  35. 35A body is suspended from a string of length 1 m and mass 2 g . The mass of the body to produce a fundamental mode of 100 Hz frequency in the04 Jul, 2022 (M)Vibration of String
  36. 36Speed of sound in air near room temperature is approximately04 Jul, 2022 (E)Speed of Sound Waves
  37. 37Speed of a sound in air25 Aug, 2021 (M)Speed of Sound Waves
  38. 38At what temperature does the velocity of sound in air increased by 10% comparison with velocity at ?25 Aug, 2021 (E)Speed of Sound Waves
  39. 39The speed of the sound in oxygen at a certain temperature is . The speed of the sound in helium (He) at the same temperature will be (assume24 Aug, 2021 (M)Speed of Sound Waves
  40. 40Two identical sinusoidal waves each of amplitude , with a phase difference of are travelling with the same direction in a string. The amplit24 Aug, 2021 (E)Basics of Mechanical Waves
  41. 41A string is divided into three segments, so that the segment possesses fundamental frequencies in the ratio . Then, the length of the segmen23 Aug, 2021 (M)Vibration of String
  42. 42What causes the formation of beats in sounds?23 Aug, 2021 (E)Beats
  43. 43A string fixed at both ends vibrates in 5 loops as shown in the figure. The total number of nodes and antinodes respectively are20 Aug, 2021 (M)Organ Pipe (Vibration of Air Column)
  44. 44Two waves are represented by: x 1 = A sin t + 6 and x 2 = A cos t . Then the phase difference between them is20 Aug, 2021 (E)Basics of Mechanical Waves
  45. 45The sources of sound A and B produce a wave of 350 Hz in same phase. A particle P is vibrating under an influence of these two waves. If the19 Aug, 2021 (M)Basics of Mechanical Waves
  46. 46Match the following: Column - I Column - II (a) Transverse wave through a steel rod (i) B + 4 3 (b) Longitudinal waves in earth s crust (ii)19 Aug, 2021 (E)Basics of Mechanical Waves
  47. 47A wave is represented by where and are in meters and in secs. The speed of the wave is07 Oct, 2020 (Special)Travelling Waves
  48. 48A closed organ pipe and an open organ pipe of same length produce 2 beats sec - 1 when they are set into vibrations together in fundamental 23 Sep, 2020 (M)Organ Pipe (Vibration of Air Column)
  49. 49A source is stationary and the observer is in motion along a line joining the source and the observer. If the frequency heard by the observe23 Sep, 2020 (M)Doppler’s Effect
  50. 50A piano wire with a diameter of is replaced by another wire of diameter of the same material. If tension of wire is kept the same, then the 22 Sep, 2020 (E)Vibration of String

Frequently Asked Questions

1.How many questions are available for Waves and Sound?

This chapter includes 126 questions compiled from AP EAMCET papers spanning 2001 to 2025.

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

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

3.Is Waves and Sound an important chapter for AP EAMCET Physics?

Waves and Sound has appeared in 24 of the 25 years of AP EAMCET papers covered here, with 126 questions across 87 papers - about one per paper it appears in.

4.What is the difficulty level of Waves and Sound questions in AP EAMCET?

Of the 126 questions analysed for this chapter, 37% are easy, 47% moderate and 16% tough. 2018 had the most, with 14 questions.

5.Which topics in Waves and Sound should I focus on?

These topics have carried the most weightage in Waves and Sound:

  • Doppler’s Effect - 25 questions (20%)
  • Vibration of String - 24 questions (19%)
  • Basics of Mechanical Waves - 23 questions (18%)
  • Doppler’s Effect has produced the most tough questions (11).
6.Is Waves and Sound's weightage in AP EAMCET going up or down?

Across all 87 papers analysed, Waves and Sound has averaged about 1.4 questions per paper. In the last three years (2022–2024), that average has fallen, at about 0.9 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.