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Two whistles Aand B produces notes of fr...

Two whistles Aand B produces notes of frequencies 660 Hz and 596 Hz respectively. There is a listener at the mid- point of the line joining them. Now the whistle B and the listener start moving with speed 30 m/s away from the whistle A. If speed of sound be 330 m/s, how many beats will be heard by the listener

A

2

B

4

C

6

D

8

Text Solution

Verified by Experts

The correct Answer is:
B
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MOTION-SOUND WAVES-Exercise - 2
  1. The sun is rotating about its own axis. The spectral lines imitted fro...

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  2. An observer moving towards a stationary source observes that the appar...

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  3. If the velocity of sound is V, velocity of the observer is V(0) and ...

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  4. When a source of frequency n is receding away from a stationary observ...

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  5. A source is approaching a stationary observer with uniform acceleratio...

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  6. A star, emitting green light, is approaching the earth with uniform ac...

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  7. A man stands at rest in front of a large smooth wall. Directly in fron...

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  8. A whistle is rotated with 2 rotations/sec in a circle of radius 1 mete...

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  9. {:(overset(*)(A),overset(*)(S(1)),overset(*)(B),overset(*)(S(2)),overs...

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  10. A person is standing at distance of r from a source of sound. The freq...

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  11. If the wavelength of light emitted by a star is shifted towards red en...

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  12. Two whistles Aand B produces notes of frequencies 660 Hz and 596 Hz re...

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  13. The frequency of a radar is 780 MHz. After getting reflected from an a...

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  14. If a source sounding a whistle with a constant frequency moves in a ci...

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  15. A band playing music at a frequency f is moving towards a wall at a sp...

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  16. An engine giving whistle is moving towards a stationary observer with ...

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  17. Velocity of sound in air is 332 m//sec . The shortest length of an ope...

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  18. two sound sources are moving in oppostive directions with velocities ...

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  19. engine as heard by an observer, when the engine moves towards the obse...

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  20. A car moving at 20 m//s with its horn blowing (n = 1200 Hz) is chasing...

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