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Assertion : In a sound wave, a displacem...

Assertion : In a sound wave, a displacement node is a pressure antinode and vice versa.
Reason : Displacement node is a point of minimum displacement

A

TFT

B

FTT

C

FFF

D

TTT

Text Solution

Verified by Experts

The correct Answer is:
C
`f=((vpmv_(0))/(vpmv_(s)))f_(0)`
Here, `v_(0)=v_(s)=0`
So, `f=f_(0)`
In standing wave formation in a close organ pipe pressure node is a displacement antinode beat frequency `|f_(1)-f_(2)|` it cannot be negative.
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"In a sound wave, a displacement node is a pressure antinode and vice versa'. Why?

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S_(1) : Source and observer both are stationary and wind is blowing in a direction from source to observer then observer detects an apparent increase in frequency. S_(2) : Beat frequency is defined as the difference of frequency of two sources. S_(3) : Pressure node is always a displacement node and pressure antinode is always a displacement antinode.

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RESONANCE ENGLISH-SOUND WAVES-Exercise- 3 PART - I
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  2. An observer standing on a railway crossing receives frequencies 2.2 kH...

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  3. An open pipe is in resonance in 2nd harmonic with frequency f(1). Now ...

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  4. Two plane harmonic sound waves are expressed by the equations. y(1)(...

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  5. Two plane harmonic sound waves are expressed by the equations. y(1)(...

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  6. Two plane harmonic sound waves are expressed by the equations. y(1)(...

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  7. Two trains A and B moving with speeds 20m//s and 30m//s respectively i...

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  8. Two trains A and B are moving with speeds 20 m/s and 30 m/s, respectiv...

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  9. Two trains A and B are moving with speeds 20 m//s respectively in the ...

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  10. A vibrating string of certain length l under a tension T resonates wit...

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  11. A student performed the experiment to measure the speed of sound in ai...

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  12. A stationary source is emitting sound at a fixed frequency f(o), which...

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  13. hollow pipe of length 0.8 m is closed at one end. At its open end a 0....

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  14. A police car with a siren of frequency 8 kHz is moving with uniform ve...

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  15. A person blows into the open-end of a long pipe. As a result, a high-p...

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  16. A student is performing the experiment of resonance column. The diamet...

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  17. Two vehicles, each moving with speed u on the same horizontal straight...

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  18. A student is performing an experiment using a resonance column and a t...

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  19. Four harmonic waves of equal frequency and equal intensity I(0) have p...

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  20. An observer moves towards a stationary source of sound with a velocity...

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  21. A whistle producing sound waves of frequencies 9500 Hz and above is ap...

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