Formation of Standing Waves in an Air Column
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
The frequency of a sonometer wire is , but when the weight producing the tensions are completely immersed in water the frequency becomes and on immersing the weights in a certain liquid the frequency becomes . The specific gravity of the liquid is

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 0.0075m3. The fundamental frequency of the wire is 260Hz. Find the new fundamental frequency if the suspended mass is completely submerged in water

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

A string is divided into three segments, so that the segment possesses fundamental frequencies in the ratio Then, the length of the segments are in the ratio

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

At the closed end of an organ pipe:

The fundamental frequency of a string is proportional to.

A pipe open at both ends has a fundamental frequency 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:

On which principle does sonometer work?

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 = ) of the water level in the tube for that resonance is,

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

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

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

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

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

For the stationary wave , the distance between a node and the next antinode is

A travelling wave represented by is superimposed on another wave represented by . The resultant is:

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

A pipe closed at one end has length . The number of possible natural oscillations of air column whose frequencies lie below are (velocity of sound in air )

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