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The fundamental frequency in an open...

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 . If the length of the closed organ of a closed organ pipe is 20 cm , the length of the open organ pipe is

A

`12.5 cm`

B

`8 cm `

C

`13.2 cm `

D

`16 cm`

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Knowledge Check

  • 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

    A
    12 . 5 cm
    B
    8 cm
    C
    13 . 2 cm
    D
    16 cm

  • The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open at both the ends. The length of organ pipe open at both the ends is

    A
    80 cm
    B
    100 cm
    C
    120 cm
    D
    140 cm

  • The length of an open organ pipe is twice the length of another closed organ pipe. The fundamental frequency of the open pipe is 100 Hz. The frequency of the third harmonic of the closed pipe is

    A
    100 Hz
    B
    200 Hz
    C
    300 Hz
    D
    150 Hz

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