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A tuning fork of frequency 256 h(Z) is m...

A tuning fork of frequency `256 h_(Z)` is moving towards a well with a velocity of `5 m//s` . If the speed of sound is `330 m//s` , then the number of beats heard per second by a stationary observer lying between tuning fork and the well is

A

`2`

B

`4`

C

zero

D

`8`

Text Solution

Verified by Experts

The correct Answer is:
C
`underset(S)(rarr) O. | overset(S')(larr)`
Both `S` and `S'` are moving toward observer. Hence,
`f_(S) = f_(S')` or `f_(b) = 0`
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DC PANDEY-SOUND WAVES-Level 1 Objective
  1. A closed organ pipe and an open organ pipe are tuned to the same funda...

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  2. A sonometer wire under a tension of 10 kg weight is in unsion with a t...

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  3. A tuning fork of frequency 256 h(Z) is moving towards a well with a ve...

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  4. Two sound waves of wavelength 1 m and 1.01 m in a gas produce 10 beats...

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  5. when a source is going away from a stationary observer with the veloci...

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  6. When interference is produced by two progressive waves of equal freque...

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  7. A tuning fork of frequency 500 H(Z) is sounded on a resonance tube . T...

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  8. A vehicle , with a horn of frequency n is moving with a velocity of 30...

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  9. How many frequencies below 1 kH(Z) of natural oscillations of air colu...

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  10. a sound source emits frequency of 180 h(Z) when moving towards a rigid...

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  11. Two sound waves of wavelengths lambda(1) and lambda(2) (lambda (2) gt ...

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  12. A, Band C are three tuning forks. Frequency of A is 350 H(Z) . Beats p...

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  13. The first resonance length of a resonance tube is 40 cm and the second...

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  14. Two identical wires are streched by the same tension of 100 N and each...

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  15. A tuning fork of frequency 340 Hz is excited and held above a cylindri...

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  16. In a closed end pipe of length 105 cm , standing waves are set up corr...

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  17. Oxygen is 16 times heavier than hydrogen. At NTP equal volumn of hydro...

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  18. A train is moving towards a stationary observer. Which of the followin...

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  19. A closed organ pipe and an open organ pipe of same length produce 4 be...

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  20. One train is approaching an observer at rest and another train is rece...

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