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Two sources of sound placed closed to ea...

Two sources of sound placed closed to each other, are emitting progressive waves given by
`y_(1)=4 sin 600 pi t`
and `y_(2)=5 sin 608 pi t`
An observer located near these two sources of sound will hear

A

8 beats per second with intensity ratio 81 : 1 between waxing and waning

B

4 beats per second with intensity ratio 81 : 1 between waxing and waning

C

4 beats per second with intensity ratio 25 : 16 between waxing and waning

D

8 beats per second with intensity ratio 25 : 16 between waxing and waning

Text Solution

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The correct Answer is:
B
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MOTION-SOUND WAVES-Exercise - 3 (Section - A)
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  10. If n(1), n(2 ) "and" n(3) are the fundamental frequencies of three seg...

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  12. An astronomical object is moving with such a speed that red shift of 1...

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  13. The fundamental frequency of a closed organ pipe of length 20 cm is eq...

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  15. A uniform string of length 20 m & mass 1 kg is hung vertically. Find t...

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  16. A siren emtting a sound of frequency 800 Hz moves away from an observe...

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  17. An air column, closed at one end and open at the other resonates with ...

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  18. The two nearest harmonics of a tube closed at one end and open at othe...

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  20. A tuning fork is used to produce resonance in glass tuve. The length o...

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