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The frequency of sound waves produced by...

The frequency of sound waves produced by an organ pipe is n , at room temperature . If the temperature is increased by `20^(@) C` , then the frequency of sound waves

A

will decrease

B

will increase

C

will remain unchanged

D

will be reduced by `20%`

Text Solution

Verified by Experts

The correct Answer is:
B
The velocity waves ` v propto sqrtT`. If the temperature is increased , v will increase. But `v = n lambda`. The wavelength `lambda` depends upon the length of the tube, which is not changed .
` :. ` If v is increased , n will increase.
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Assertion: The fundamental frequency of an open organ pipe increases as the temperature is increased. Reason: As the temperature increases, the velocity of sound increases more rapidly than length of the pipe.

MARVEL PUBLICATION-STATIONARY WAVES-MULTIPLE CHOICE QUESTIONS (HIGHER LEVEL)
  1. Tube A has both ends open while tube B has one end closed. Otherwise...

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  2. The lengths of two organ pipes open at both ends are L and L + d. If...

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  3. The frequency of sound waves produced by an organ pipe is n , at room ...

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  4. An open pipe is suddenly closed at one end with the result that the fr...

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  5. An open organ pipe of length L vibrates in its fundamental mode. The p...

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  6. In the fundamental mode , time taken by the wave to reach the closed e...

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  7. For a certain pipe, three successive resonant frequencies are observed...

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

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  9. An open pipe of length 120 cm vibrates in its fundamental mode. At wha...

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  10. A source of sound placed at the open end of a resonance column sends a...

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  11. A steel rod 100 cm long is clamped at its middle. The fundamental freq...

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  12. n(1) is the frequency of the pipe closed at one and n(2) is the freque...

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  13. An organ pipe P(1) open at one end vibrating in its first harmonic and...

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  14. A cylindrical tube open at both ends, has a fundamental frequency f in...

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

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  16. Two organ pipes having the same internal diameter ( d) but of differen...

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  17. The p^(th) overtone of an organ pipe open at both ends has a frequency...

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  18. In a pipe opened at both ends n(1) and n(2) be the frequencies corres...

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  19. Two open organ pipes of lengths 25 cm and 25.5 produce 10 beats/sec. W...

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  20. The fundamental of a closed pipe is 220 Hz. If (1)/(4) of the pipe is ...

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