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Physics - Waves and Sound

Practise 59 COMEDK previous year questions on Waves and Sound, compiled from papers spanning 2012 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty COMEDK tests.

Waves and Sound has been asked in 15 of the 15 years of COMEDK papers analysed (2012–2026), with 59 questions in all. 31% of them were easy, 58% moderate and 12% tough. Most of its questions came from 2023, with 7 questions that year. In the last three years (2024–2026) it had 10 questions across 10 papers, about 1 per paper.

The chapter's 9 topics are not weighted equally: Doppler's Effect (13 questions, 22%), Vibration of String (9 questions, 15%), and Organ Pipe (Vibration of Air Column) (7 questions, 12%) have been asked the most. Doppler's Effect has also led over the last five years, with 6 questions. Doppler's Effect has produced the most tough questions (3).

  1. 1The speed of transverse wave in aluminium wire is times the speed of longitudinal wave in the wire. The stress in the wire is (Young's Modul09 May, 2026 (S1)Basics of Mechanical Waves
  2. 2Resonance is produced between a turning fork and a resonance column tube with upper end open and lower end closed by water surface. If the f09 May, 2026 (S2)Organ Pipe (Vibration of Air Column)
  3. 3A sonometer wire of length 80 cm and a tuning fork sounded together produces 5 beats per second. The same number of beats per second is prod25 May, 2025 (Shift)Vibration of String
  4. 4A sonometer string vibrates with a frequency of 400 Hz . When the length of the string is halved and the tension is altered, it begins to vi10 May, 2025 (S1)Vibration of String
  5. 5An open pipe is in second harmonic with frequency . One end of the tube is closed and frequency is increased to and it resonates again with 10 May, 2025 (S2)Organ Pipe (Vibration of Air Column)
  6. 6The fundamental frequency of sound produced in an open pipe of length is same as the frequency of the harmonic of the sound produced in the 10 May, 2025 (S3)Organ Pipe (Vibration of Air Column)
  7. 7A tuning fork of unknown frequency produces 4 beats with tuning fork of frequency . It gives the same number of beats on filing. The initial2024 (Afternoon Shift)Beats
  8. 8The number of possible natural oscillations of air column in a pipe closed at one end of length whose frequencies lie below are (velocity of2024 (Evening Shift)Vibration of String
  9. 9In a resonance column experiment, the first resonance is obtained, when the level of the water in tube is 20 cm from the open end. Resonance2024 (Memory Based)Organ Pipe (Vibration of Air Column)
  10. 10A string of length and mass is clamped at its ends. The tension in the string is . The identical wave pulses are generated at one end and at2024 (Morning Shift)Basics of Mechanical Waves
  11. 11Two open organ pipes A and B of length and respectively produce 2 beats per sec when sounded together. The frequency of the shorter pipe is2023 (Evening Shift)Organ Pipe (Vibration of Air Column)
  12. 12With what velocity should an observer approach a stationary sound source, so that the apparent frequency of sound should appear double the a2023 (Memory Based)Doppler's Effect
  13. 13A car is moving towards a high cliff. The car driver sounds a horn of frequency . The reflected sound heard by the driver has a frequency . 2023 (Memory Based)Doppler's Effect
  14. 14A string vibrates with a frequency of . When its length is doubled and tension is altered, it begins to vibrate with a frequency of . The ra2023 (Memory Based)Basics of Mechanical Waves
  15. 15A string vibrates with a frequency of . When its length is doubled and tension is altered, it begins to vibrate with a frequency of . The ra2023 (Morning Shift)Vibration of String
  16. 16A car is moving towards a high cliff. The car driver sounds a horn of frequency . The reflected sound heard by the driver has a frequency . 2023 (Morning Shift)Doppler's Effect
  17. 17With what velocity should an observer approach a stationary sound source, so that the apparent frequency of sound should appear double the a2023 (Morning Shift)Doppler's Effect
  18. 18A bat emitting an ultrasonic wave of frequency at speed of between two parallel walls. The two frequencies heard by the bat will be2022Doppler's Effect
  19. 19A source of sound emits sound waves at frequency . It is moving towards an observer with fixed speed f v_0$ is given correctly by2022Doppler's Effect
  20. 20The string of length is fixed at both ends. If the string vibrates in its fourth normal mode with a frequency of , then the waves would trav2022Vibration of String
  21. 21The displacement of a wave is given by . The amplitude of the given wave is2021Basics of Mechanical Waves
  22. 22If frequencies are and , then find the value of beats.2021Beats
  23. 23The equation of a progressive wave can be given by . The frequency of the wave is2020Basics of Mechanical Waves
  24. 24A source of sound gives 5 beats per second, when sounded with another source of frequency . The second harmonic of the source, together with2020Beats
  25. 25Oxygen is 16 times heavier than hydrogen. Equal volumes of hydrogen and oxygen are mixe(d)The ratio of speed of sound in the mixture to that2019Speed of Sound Waves
  26. 26If two waves of the same frequency and amplitude respectively on superposition produce a resultant disturbance of the same amplitude the wav2019Interference and Superposition of Waves
  27. 27A man, standing between two cliffs, claps his hands and starts hearing a series of echoes at intervals of one secon(d)If the speed of sound 2019Beats
  28. 28Sound waves in air are always longitudinal because2019Properties of Sound Waves
  29. 29The loudness and pitch of a sound note depends on2019Properties of Sound Waves
  30. 30In Melde's experiment in the transverse mode, the frequency of the tuning fork and the frequency of the waves in the string are in the ratio2019Vibration of String
  31. 31The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is of the 2019Doppler's Effect
  32. 32The equation of a simple harmonic wave is given by , where and are in and is in seconds. The phase difference between two particles apart at2018Travelling Waves
  33. 33With what velocity should an observer approach a stationary sound source, so that the apparent frequency of sound should appear double the a2018Doppler's Effect
  34. 34A string vibrates with a frequency of . When its length is doubled and tension is altered, it begins to vibrate with a frequency of . The ra2018Vibration of String
  35. 35How many times more intense is a sound than a sound?2018Properties of Sound Waves
  36. 36A particle on the trough of a wave at any instant will come to the mean position after a time time period2017Travelling Waves
  37. 37The disc of a siren containing 60 holes rotates at a constant speed of . The emitted sound is in unison with a tuning-fork of frequency2017Travelling Waves
  38. 38The ratio of velocity of sound in hydrogen and oxygen at STP is2017Speed of Sound Waves
  39. 39In an experiment with sonometer a tuning fork of frequency resonates with a length of and another tuning fork resonates with a length of . T2017Vibration of String
  40. 40The apparent frequency of a note is . When a listener is moving with a velocity of towards a stationary source. When he moves away from the 2017Doppler's Effect
  41. 41Two coherent light beams of intensity and are superpose(d) The maximum and minimum possible intensities in the resulting beam are2017Interference and Superposition of Waves
  42. 42sound is times more intense than sound, then is2016Properties of Sound Waves
  43. 43A star is moving away from the earth with speed v. Change in wavelength observed on earth is2016Doppler's Effect
  44. 44An open pipe emits a fundamental frequency when it emits the 3rd harmonic, then the pipe can accommodate2016Organ Pipe (Vibration of Air Column)
  45. 45A steel wire has a length of which is under a constant tension of . The speed of the transverse waves that can be produced in the wire will 2015Travelling Waves
  46. 46A galaxy moves with respect to the earth, so that sodium line of is observed at . The speed of the galaxy is2014Doppler's Effect
  47. 47A hospital uses an ultrasonic scanner to locate tumors in a tissue. The operating frequency of the scanner is . The speed of sound in a tiss2014Speed of Sound Waves
  48. 48A policeman on duty detects a drop of in the pitch of the horn of a motor car as it crosses him. If the velocity of sound is , then calculat2014Doppler's Effect
  49. 49The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is of the 2013Doppler's Effect
  50. 50The loudness and pitch of a sound note depend on2013Properties of Sound Waves

Frequently Asked Questions

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

This chapter includes 59 questions compiled from COMEDK papers spanning 2012 to 2026.

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

These are COMEDK 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 COMEDK Physics?

Waves and Sound has appeared in 15 of the 15 years of COMEDK papers covered here, with 59 questions across 24 papers - about 2 per paper it appears in.

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

Of the 59 questions analysed for this chapter, 31% are easy, 58% moderate and 12% tough. 2023 had the most, with 7 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 - 13 questions (22%)
  • Vibration of String - 9 questions (15%)
  • Organ Pipe (Vibration of Air Column) - 7 questions (12%)
  • Doppler's Effect has produced the most tough questions (3).
6.Is Waves and Sound's weightage in COMEDK going up or down?

Across all 24 papers analysed, Waves and Sound has averaged about 2.5 questions per paper. In the last three years (2024–2026), that average has fallen, 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.