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

  • question_answer
    On producing the waves of frequency 1000 Hz in a Kundt's tube, the total distance between 6 successive nodes is 85 cm. Speed of sound in the gas filled in the tube is  [AFMC 1999]

    A)            330 m/s                                  

    B)            340 m/s

    C)            350 m/s                                  

    D)            300 m/s

    Correct Answer: B

    Solution :

                       Distance between six successive node                     \[=\frac{5\lambda }{2}=85cm\] Þ\[\lambda =\frac{2\times 85}{5}=34\,cm=0.34\,m\] Therefore speed of sound in gas \[=n\lambda =1000\times 0.34=340\,m/s\]


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