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  • I have a doubt, kindly clarify. The fundamental frequency in an open organpipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is

The fundamental frequency in an open organ
pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is

 

  • Option 1)

    12.5 cm

  • Option 2)

    8 cm

  • Option 3)

    13.2 cm

  • Option 4)

    16 cm

 

Answers (1)

Let length of closed pipe is l 

=> v_{1} of open pipe = v_{3}  of closed pipe 

\frac{v}{2l}= 5* \frac{v}{4*20 cm}\Rightarrow l=8cm


Option 1)

12.5 cm

Option 2)

8 cm

Option 3)

13.2 cm

Option 4)

16 cm

Posted by

Vakul

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