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Sound

MHT-CET Physics. Try each one first, then open its answer.

Top 10 MHT-CET PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 7 times: 3 May 2023 S2, 10 May 2024 S1, 14 May 2024 S2, 23 Apr 2025 S1, 25 Apr 2025 S1, 20 Apr 2026 S1, 12 May 2026 S1. This one: 12 May 2026 S1 See all 7 of this type

    124
    A whistle giving out 400400 Hz approaches a stationary observer at a speed of 3434 m/s. The frequency heard by the observer (in Hz) is nearly (speed of sound =340= 340 m/s)

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  2. Question 2

    This type asked 5 times: 3 May 2023 S1, 4 May 2023 S2, 11 May 2024 S1, 11 Apr 2026 S2, 16 Apr 2026 S2. This one: 16 Apr 2026 S2 See all 5 of this type

    124
    A person observes two moving trains. 'A' reaching the station and 'B' leaving the station with equal speed of 30m/s. If both trains emit sounds with frequency 300 Hz, (speed of sound = 330 m/s) difference of frequencies heard by the person will be

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  3. Question 3

    Asked 4 times: 10 May 2023 S1, 20 Apr 2025 S1, 26 Apr 2025 S2, 16 Apr 2026 S1 See all 4 times it was asked

    123
    When the observer moves towards a stationary source with velocity 'V1V_1', the apparent frequency of the emitted note is 'F1F_1'. When the observer moves away from the source with velocity 'V1V_1', the apparent frequency is 'F2F_2'. If 'V' is the speed of sound in air and F1/F2=2F_1/F_2 = 2, then V/V1=V/V_1 =

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  4. Question 4

    Asked 4 times: 9 May 2023 S2*, 10 May 2023 S1*, 26 Apr 2025 S2*, 13 Apr 2026 S1 (* = numbers or wording changed that year) See all 4 times it was asked

    121
    A musical instrument P produces sound waves of frequency 'n' and amplitude 'A'. Another musical instrument Q produces sound waves of frequency n/4. The waves produced by P and Q have equal energies. The amplitude of waves produced by Q will be

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  5. Question 5

    This type asked 4 times: May 2021 S1, 17 Apr 2026 S1, 20 Apr 2026 S1, 20 Apr 2026 S2. This one: 20 Apr 2026 S2 See all 4 of this type

    122
    Two monoatomic ideal gases '1' and '2' of molecular masses m1m_1 and m2m_2 respectively are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas '1' to that in gas '2' is

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  6. Question 6

    This type asked 3 times: 9 May 2023 S1, 11 May 2023 S1, 16 Apr 2026 S2. This one: 16 Apr 2026 S2 See all 3 of this type

    121
    An air column in a pipe which is closed at one end will be in resonance with a vibrating tuning fork of frequency 415 Hz for various vibrating air columns. Which one of the following lengths is not in resonance ? (velocity of sound in air = 332 m/s) (Neglect end correction)

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  7. Question 7

    Asked 2 times: 22 Apr 2025 S1*, 18 Apr 2026 S2 (* = numbers or wording changed that year) See all 2 times it was asked

    124
    A person standing between two parallel cliffs fires a gun and hears two echoes, first echo after 1 second and second echo after 3 second. The distance between the two cliffs is (The velocity of sound =330= 330 m/s)

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  8. Question 8

    Asked 2 times: 12 May 2024 S1*, 17 Apr 2026 S2 (* = numbers or wording changed that year) See all 2 times it was asked

    124
    Two sounding waves send waves at certain temperature in air of wavelength 50 cm and 50.5 cm repectively. The frequency of sources differ by 6 Hz. The velocity of sound in air at same temperature is

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  9. Question 9

    Asked 2 times: 9 May 2023 S1*, 17 Apr 2026 S1 (* = numbers or wording changed that year) See all 2 times it was asked

    123
    Out of the following musical instruments which is ' NOT ' a percussion instrument?

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  10. Question 10

    Asked 2 times: 15 Apr 2026 S2*, 16 Apr 2026 S2 (* = numbers or wording changed that year) See all 2 times it was asked

    123
    When open pipe is closed from one end then third overtone of closed pipe is higher in frequency by 150Hz than second overtone of open pipe. The fundamental frequency of open end pipe will be (Neglect end correction)

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