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A motor car blowing a horn of frequency ...

A motor car blowing a horn of frequency `124vib//sec` moves with a velocity `72km//hr` towards a tall wall. The frequency of the reflectedf sound heard by the driver will be (velocity of sound in air is `330 m//s`)

A

109 vib/s

B

132 vib/s

C

140 vib/s

D

248 vib/s

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The correct Answer is:
B
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TARGET PUBLICATION-WAVE MOTION -MCQ 7.1
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  13. The equation of sound wave travelling along negative X-direction is gi...

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  14. A progressive wave is represented by the equation y= 0.5 sin ( 314t- ...

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  15. A wave of frequency 400 Hz has a phase velocity of 300 m/s The phase d...

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  16. A prograssive wave of frequency 500 Hz is travelling with a speed of 3...

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  17. If the speed of the wave shown in the figure is 330m//s in the given m...

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  18. The equation of a wave is y=A sin (2pint) When it is reflected at a f...

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  19. A bat flying above lake emits ultrasonic sound of 100 kHz ,When this w...

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