Formation of Standing Waves in an Air Column

IMPORTANT

Formation of Standing Waves in an Air Column: Overview

This topic covers concepts, such as, Open Organ Pipe, Fundamental Frequency of Open Organ Pipe, Displacement Wave in Closed Organ Pipe & End Correction in Closed Organ Pipe etc.

Important Questions on Formation of Standing Waves in an Air Column

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The ratio of first harmonic of open organ pipe and closed organ pipe for the same length is

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fundamental frequency of closed organ pipe is ( V=velocity of sound in air, L=Length of organ pipe)

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Fundamental frequency of open organ pipe is ( V=Velocity of sound in air, L=Length of pipe)

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For a organ pipe of length L, closed at both ends, the first displacement node is presend at :

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At the closed end of an organ pipe:

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A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now:

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A source of frequency 340 Hz is kept above a vertical cylindrical tube closed at lower end. The length of the is 120cm. Water is slowly poured in just enough to produce resonance. Then the minimum height (velocity of sound = 340m/s ) of the water level in the tube for that resonance is,

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The fundamental frequency of an air column in a pipe closed at one end is 100 Hz. If the same pipe is open at both the ends, the frequencies produced in Hz are

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The frequency of the first overtone of a closed pipe of length lc is equal to that of the third overtone of an open pipe of length lo. The ratio lolc will be,

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In case of a closed organ pipe which harmonic, the pth overtone will be?

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A pipe closed at one end has length 83 cm. The number of possible natural oscillations of air column whose frequencies lie below 1000 Hz are (velocity of sound in air =332 m s-1)

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An open organ pipe has a fundamental frequency 100 Hz. What frequency will be produced if its one end is closed?

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A pipe 30 cm long, is open at both ends. Which harmonic mode of the pipe resonates a 1.1 kHz source?
(Speed of sound in air=330 m s-1)

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A tuning fork of frequency 340 Hz is excited and held above a cylindrical tube of length 120 cm. It is slowly filled with water. What is the minimum height (in cm) of the water column required for resonance to be first heard? (Velocity of sound =340 ms-1)

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An open pipe 40 cm long, and a closed pipe 31 cm long, both are having same diameter. Both are in unison in their first overtone. Determine end correction of closed pipe in cm.

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The speed of sound in air is 350 m s-1. The fundamental frequency of an open pipe 50 cm long will be a×102 Hz, what is the value of a in proper decimal?

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As an empty vessel is filled with water, its frequency:

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An open pipe of length 33 cm resonates with frequency of 1000 Hz . If the speed of sound is 330m/s, then this frequency is:

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An organ pipe  P1 closed at one end vibrating in its first overtone and another pipe P2 open at both ends vibrating in its third overtone are in resonance with a given tuning fork. The ratio of the length of P1 to that ofP2 is:

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A closed organ pipe of length L and an open organ pipe contain gases of densitiesρ1  and ρ2 respectively. The compressibility of gases is same in both the pipes which are vibrating in their first overtone with same frequency. The length of the open organ pipe is: