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NEET Sample Paper NEET Sample Test Paper-55

  • question_answer
    Ten tuning forks are arranged in increasing order of frequency in such a way that any two nearest tuning forks produce 4 beats per sec. The highest frequency is twice that of the lowest. Possible highest and lowest frequencies are

    A) 80 and 40                     

    B) 100 and 50

    C) 44 and 32                     

    D) 72 and 36

    Correct Answer: D

    Solution :

    \[n+9\,\,\times \,\,4\,\,=\,\,2n\] \[\,n=36,\,\,72\]


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