Chapter 16 – Waves

An organ pipe, open from both end produces 5 beats per second when vibrated with a source of frequency 200 Hz. The second harmonic of the same pipes produces 10beats per second with a source of frequency 420 Hz. The fundamental frequency of organ pipe is An organ pipe are Two closed pipe produce 10 [...]

A source of sound is travelling towards a stationary observe. The frequency of sound heard by the observer is of the three times of the original frequency. The velocity of sound is v m/s. The speed of source will be: are Two closed pipe produce 10 beats per second when emitting their fundamental nodes. If [...]

A source of sound emits waves with frequency f Hz and speed of sound is v m/s. Two observers move away from this source in opposite directions each with a speed 0.2 v relative to the source. The ratio of frequencies heard by the two observers will be: are Two closed pipe produce 10 beats [...]

The wavelength is 120 cm when the source is stationary. If the source is moving with relative velocity of 60 m/sec towards the observer, then the wavelength of the sound wave reaching to the observer will be (velocity of sound = 330 m/s) The wavelength is 120 cm when the source is stationary. If the [...]

Two closed pipe produce 10 beats per second when emitting their fundamental nodes. If their length are in ratio of 25 : 26. Then their fundamental frequency in Hz , are are Two closed pipe produce 10 beats per second when emitting their fundamental nodes. If their length are in ratio of 25 : 26. [...]

A tuning fork when sound together with a tuning fork of frequency 256 emits two two beats. On loading the tuning fork of frequency 256, the number of beats heard is 1 per second. The frequency of unknown tuning fork is A tuning fork when sound together with a tuning fork of frequency 256 emits [...]

A source of sound of frequency 600 Hz is placed inside water. The speed of sound in water is 1500 m/s and in air it is 300 m/s. The frequency of sound recorded by an observer who is standing in air is? he observers an apparent frequency f. When it moves away from the source [...]

When an observer moves toward a stationary source with a certain velocity, he observers an apparent frequency f. When it moves away from the source with same velocity, the observed frequency is 0.8 f. If the velocity of sound is v, then the speed of the observer is he observers an apparent frequency f. When [...]

When two tuning forks A and B are sounded together x beats/s are heard. Frequency A is n. Now when one prong of B is loaded with a little wax, the number of beats/s decreases. The frequency of fork B is the number of beats/s decreases. The frequency of fork B is When two tuning [...]

A tuning fork of frequency 480 Hz produces 10 beats/s when sounded with a vibrating sonometer string. What must have been the frequency of the string if a slight increase in tension produces fewer beats per second than before? the velocity of the sound in gas is Two sound waves of wavelengths 1 m and [...]