Home
Class 12
PHYSICS
A source of sound S emitting waves of fr...

A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from each other. The source is moving with a speed of `19.4 ms^(-1)` at an angle of `60^@` with the source observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air `330 ms^(-1)`), is:

A

97 Hz

B

100 Hz

C

103 Hz

D

106 Hz

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

An observer starts moving with uniform acceleration ‘a’ towards a stationary sound source emitting a whistle of frequency ‘n\ As the observer approaches source, the apparent frequency heard by the observer varies with time as

What should be the velocity of sound from a source w.r.t. an observer, so that the frequency listened by the observer becomes half of the initial frequency?

An observer moves towards a stationary source of sound with a speed 1//5^(th) of the speed of sound. The wavelength and frequency of the source emitted are X and f respectively. The apparent frequency and wavelength recorded by the observer are respectively

A source and an observer move away from each other with a velocity of 10 m/s with respect to ground. If the observer finds the frequency of sound coming from the source as 1950 Hz , then actual frequency of the source is (velocity of sound in air = 340 m/s )

The apparent change in frequency of a sounding source and observer in relative motion is

A source of sound emitting a note of frequency 90 Hz moves towards an observer with speed equal to ( (1)/( 10 ) )^(th ) of velocity of sound.The frequency of the note heard by the observer will be

An engine blowing a whistle of frequency 133 Hz moves with a velocity of 60 ms^(-1) owards a hill from which an echo is heard. The frequency of the echo heard by the driver (Velocity of sound in air=340 ms^(-1) )

A source of sound has frequency 2000 Hz. If the speed of sound in air 340m//s , find the distance covered by sound when the source completes 400 vibrations.

Two aeroplanes A and B, each moving with a speed of 720 km/hour, are moving directly away from each other. Aeroplane A emits a whistle of frequency 1080 Hz. The apparent frequency heard by a person in plane B will be (velocity of sound in air = 340 m//s )

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 ms^(-1) . Then, the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air = 330 ms^(-1) )