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A traffic policeman standing on a road sounds a whistle emitting the main frequency of 2.00 kHz. What could be the apparent frequency heard by a scooter driver approaching the policeman at a speed of `36.0km h^(-1) ?` Speed of sound in air `=340 m s^(-1).`

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2.06 KHz
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AAKASH SERIES-WAVE MOTION AND SOUND-PROBLEMS (LEVEL - I)
  1. An organ pipe has two successive harmonics with frequencies 400 and 56...

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  2. The fundamental frequency of a closed pipe is 220 H(Z). (a) Find the...

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  3. The fundamental frequency of a closed pipe is 220 H(Z). (a) Find the...

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  4. A source of frequency 10kHz when viberted over than mouth of a closed ...

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  5. A closed organ pipe and an open organ pipe of same length produce 2 be...

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  6. A tuning fork produces 4 beats per second with another tuning fork of ...

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  7. Two tuning forks when sounded together produce 5 beats in 2 seconds. T...

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  8. Two progressive waves y(1) = 4 sin 400 pi t and y(2) = 3 Sin 404 pi t ...

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  9. Calculate the frequency of beats produced in air when two sources of s...

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  10. Two sitar strings A and B playing the note ‘Ga’ are slightly out of tu...

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  11. The frequency of a tuning fork A is 2% more than the frequency of a st...

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  12. A man standing at some distance from a cliff hears the echo of sound a...

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  13. A motor car approaching a cliff with a velocity of 90 kmph sounds the ...

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  14. A person standing between two parallel hills fires a gun. He hears the...

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  15. A tuning fork of unknown frequency makes 5 beats per second with anoth...

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  16. A traffic policeman standing on a road sounds a whistle emitting the m...

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  17. A person riding a car moving at 72 km h^-1 sounds a whistle emitting a...

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  18. A person riding a car moving at 72 km h^-1 sounds a whistle emitting a...

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  19. A car moving at 108 km/h finds another car in front of it going in the...

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  20. A tuning fork of frequency 328 Hz is moved towards a wall at a speed o...

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