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JEE Main & Advanced Physics Wave Mechanics Question Bank Graphical Questions

  • question_answer
    Two tuning forks P and Q are vibrated together. The number of beats produced are represented by the straight line OA in the following graph. After loading Q with wax again these are vibrated together and the beats produced are represented by the line OB. If the frequency of P is 341Hz, the frequency of Q will be    

    A)                                                      341 Hz

    B)            338 Hz                                     

    C)            344 Hz

    D)            None of the above

    Correct Answer: C

    Solution :

                       \[{{n}_{Q}}=341\pm 3=344Hz\] or \[338Hz\] on waxing Q, the number of beats decreases hence \[{{n}_{Q}}=344Hz\]


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