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A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 27°C, two successive resonances are produced at $20$ $ \mathrm{cm}$ and $73$ $\mathrm{cm}$ of column length. If the frequency of the tuning fork is $320$ $ \mathrm{Hz}$, the velocity of sound in air at 27°C is,

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Important Questions on Sound Waves

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Beta Question Bank for Medical: Physics>Chapter 21 - Sound Waves>Exercise (Previous Year Questions)>Q 20
The fundamental frequency in an open organ pipe is equal to the third harmonic of closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
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Beta Question Bank for Medical: Physics>Chapter 21 - Sound Waves>Exercise (Previous Year Questions)>Q 21
Two waves of frequencies 10 KHz and 10.2 KHz propagate and superimpose. The time after which wave envelope repeats is,
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Beta Question Bank for Medical: Physics>Chapter 21 - Sound Waves>Exercise (Analytical Questions)>Q 1
The power of sound from the speaker of radio is 20 mW. By turning the knob of the volume control, the power of the sound is increased to 400 mW. The power increase in decibels as compared to the original power is
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Beta Question Bank for Medical: Physics>Chapter 21 - Sound Waves>Exercise (Analytical Questions)>Q 2
Frequency of tuning fork A is 256 Hz. It produces four beats per sec with tuning fork B. When wax is applied at tuning fork B, then 6 beats sec-1 are heard. The frequency of B is,
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Beta Question Bank for Medical: Physics>Chapter 21 - Sound Waves>Exercise (Analytical Questions)>Q 3
Frequency of a tuning fork A is 256 Hz. It produces four beats per sec with tuning fork B. When wax is applied at tuning fork B, then 6 beats sec-1 are heard. By reducing little amount of wax, 4 beats sec-1 are heard. The frequency of B is,
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Beta Question Bank for Medical: Physics>Chapter 21 - Sound Waves>Exercise (Analytical Questions)>Q 4

56 tuning forks are so arranged in series that each fork gives 4 beats per second with the previous one. The frequency of the last fork is three times that of the first. The frequency of the first fork is 

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Beta Question Bank for Medical: Physics>Chapter 21 - Sound Waves>Exercise (Analytical Questions)>Q 5
Two wires are fixed in a sonometer. Their tensions are in the ratio 8:1. The lengths are in the ratio 36:35. The diameters are in the ratio 4:1. Densities of the materials are in the ratio 1:2. If the higher frequency in the setting is 360 Hz, the beat frequency when the two wires sounded together is:
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Beta Question Bank for Medical: Physics>Chapter 21 - Sound Waves>Exercise (Analytical Questions)>Q 6
An open pipe is suddenly closed with the result that the second overtone of the closed pipe is found to be higher in frequency by 100 Hz than the first overtone of the original pipe. The fundamental frequency of the open pipe will be