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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-17

  • 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 341 Hz, the frequency of Q will be

    A)  341 Hz                 

    B)  338 Hz

    C)  344 Hz                 

    D)  None of these

    Correct Answer: C

    Solution :

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


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