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

  • question_answer
    If in an experiment for determination of velocity of sound by resonance tube method using a tuning fork of 512 Hz, first resonance was observed at 30.7 cm and second was obtained at 63.2 cm, then maximum possible error in velocity of sound is (consider actual speed of sound in air is 332 m/s)                       [IIT-JEE (Screening) 2005

    A)            204 cm/sec                            

    B)            110 cm/sec

    C)            58 cm/sec                              

    D)            80 cm/sec

    Correct Answer: D

    Solution :

                       Using \[\lambda =2({{l}_{2}}-{{l}_{1}})\] Þ \[v=2n({{l}_{2}}-{{l}_{1}})\]                    Þ \[2\times 512(63.2-30.7)=33280cm/s\]                    Actual speed of sound \[{{v}_{0}}=332m/s=33200cm/s\]            Hence error \[=33280-33200=80cm/s\]


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