Formation of Standing Waves in an Air Column

IMPORTANT

Formation of Standing Waves in an Air Column: Overview

This topic covers concepts, such as, Standing Waves, Equation of Standing Waves, Displacement Wave in Closed Organ Pipe & End Correction in Closed Organ Pipe etc.

Important Questions on Formation of Standing Waves in an Air Column

MEDIUM
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The frequency of a sonometer wire is f, but when the weight producing the tensions are completely immersed in water the frequency becomes f2 and on immersing the weights in a certain liquid the frequency becomes f3. The specific gravity of the liquid is

MEDIUM
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In a sonometer wire the tension is maintained by suspending a 50.7 kg mass from the free end of the wire. The suspended mass has volume of 0.0075m​3. The fundamental frequency of the wire is 260Hz. Find the new fundamental frequency if the suspended mass is completely submerged in water

HARD
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A string of length 1.5 m with its two ends clamped is vibrating in the fundamental mode. The amplitude at the centre of the string is 4 mm. The minimum distance between the two points having amplitude of 2 mm is:

EASY
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A string is divided into three segments, so that the segment possesses fundamental frequencies in the ratio 1: 2: 3. Then, the length of the segments are in the ratio ___________

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

EASY
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At the closed end of an organ pipe:

EASY
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The fundamental frequency of a string is proportional to.

MEDIUM
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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:

EASY
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On which principle does sonometer work?

EASY
IMPORTANT

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,

EASY
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In stationary waves, nodes are the points where there is:

EASY
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A string is vibrating in its fifth overtone between two rigid supports 2.4 m apart. The distance between successive node and antinode is

EASY
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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

EASY
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In sonometer experiment, the string of length L under tension vibrates in second overtone between two bridges. The amplitude of vibration is maximum at

MEDIUM
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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,

EASY
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For the stationary wave y=4sinπx15cos96 πt , the distance between a node and the next antinode is

MEDIUM
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A travelling wave represented by y= A sin(ωt-kx)  is superimposed on another wave represented by y=Asin(ωt+kx). The resultant is:

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

EASY
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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)

EASY
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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?