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A person carrying a whistle emitting con...

A person carrying a whistle emitting continuously a note of `272 Hz` is runnig towards a reflecting surface with a speed of `18km//h`. The speed of sound in air is `345ms^(-1)` The number of beats heard by him is

A

4

B

6

C

8

D

0

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The correct Answer is:
C
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AAKASH INSTITUTE-WAVES-Assignment (Section-B)
  1. The temperature at which the velocity of sound in air becomes double i...

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  2. A tuning fork produces 2 beats per second when sounded with another tu...

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  3. A person carrying a whistle emitting continuously a note of 272 Hz is ...

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  4. The equation of stationary wave along a stretched string is given by y...

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  5. Which of the followings represent the variation of frequency (f) with ...

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  6. The string of a violin has a fundamental frequency of 440 Hz. If the v...

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  7. the speed of sound in hydrogen at NTP is 1270m/s. then the speed in m/...

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  8. If you set up the seventh harmonic on a string fixed at both ends, how...

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  9. The equation of a standing wave in a string fixed at both its ends is ...

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  10. An isotropic point source 'S' of sound emits constant power. Two point...

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  11. A sinusoidal wave is given by y=A sin (kx-omegat). The ratio of its ma...

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  12. A stretched string is fixed at both its ends. Three possible wavelengt...

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  13. For an organ pipe, four of the six harmonics of frequency less than 10...

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  14. A thick uniform rope of length L is hanging from a rigid support. A tr...

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  15. Third overtone of a closed organ pipe is in unison with fourth harmoni...

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  16. The string of a violin emits a note of 205 Hz when its tension is corr...

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  17. A whistle 'S' of frequency v revolves in a circle of radius R at a con...

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  18. Two sinusoidal waves are superposed. Their equations are y(1)=Asin(k...

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  19. Two vibrating tuning forks producing waves given by y(1) = 27 "sin" 60...

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  20. In a stationary wave, all particles of the medium cross the mean posit...

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