A wall is moving with constant velocity `u` towards a fixed source of sound of frequency `f`. The velocity of sound is `v`. The wavelength of the sound reflected by the wall is

The driver of a car travelling with a speed of 30 m/s towards a wall sounds a siren of frequency 500 Hz. If the velocity of sound in air is 330 m/s, then the frequency of the sound reflected from the wall and as heard by the driver is

If an observer is moving with uniform velocity v to wards a stationary source of frequency n, and if the velocity of sound in the medium is V, then the apparent change in the frequency of the sound, heard by the observer, is -

A wall is moving with velocity u and a source of sound moves with velocity (u)/(2) in the same direction as shown in the figure. Assuming that the sound travels with velocity 10u , the ratio of incident sound wavelength on the wall to the reflected sound wavelength by the wall is equal to

A wall is moving with velocity u and a source of sound moves with velocity (u)/(2) in the same direction as shown in the figure. Assuming that the sound travels with velocity 10u , the ratio of incident sound wavelength on the wall to the reflected sound wavelength by the wall is equal to

A source of frequency n is moving with a uniform velocity v towards a stationary observer. If the velocity of sound is V, then the change in frequency would be -

A car travels at a speed of 'a' towards a high wall. The driver sounds a horn of frequency 'n'. If V is the velocity of sound in air, frequency of reflected sound heard by the driver is

A car travels at a speed of 'a' towards a high wall. The driver sounds a horn of frequency 'n'. If V is the velocity of sound in air, frequency of reflected sound heard by the driver is

A source of sound with frequency 256 Hz is moving with a velocity V towards a wall and an observer is stationary between the source and the wall. When the observer is between the source and the wall will he hear beats?

A source of sound with frequency 256 Hz is moving with a velocity V towards a wall and an observer is stationary detween the source and the wall. When the observer is between the source and the wall he will hear beats.