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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2011

  • question_answer
    Two tuning forks A and B, produce notes of frequencies 258 Hz and 262 Hz. An unknown note sounded with A produces certain beats. When the same note is sounded with B, the beat frequency gets doubled. The unknown frequency is

    A)  250 Hz        

    B)  252 Hz

    C)  254 Hz        

    D)  256 Hz

    Correct Answer: C

    Solution :

    Given, \[{{n}_{A}}=258Hz,{{n}_{B}}=262Hz\] If it produces x beats with 258 and 2x with 262. \[262-(258-x)=2x\] \[262-258+x=2x\] \[n=254Hz\]


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