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JEE Main & Advanced Physics Wave Mechanics Question Bank Organ Pipe (Vibration of Air Column)

  • question_answer
    Fundamental frequency of an open pipe of length 0.5 m is equal to the frequency of the first overtone of a closed pipe of length l. The value of lc is (m)                      [KCET 1999]

    A)            1.5 

    B)            0.75

    C)            2    

    D)            1

    Correct Answer: B

    Solution :

               First tone of open pipe = first overtone of closed pipe Þ\[\frac{v}{2{{l}_{0}}}=\frac{3v}{4{{l}_{c}}}\]Þ \[{{l}_{c}}=\frac{3\times 2\times 0.5}{4}=0.75m\]


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