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  3. J & K CET Medical

J & K CET Medical J & K - CET Medical Solved Paper-2005

  • question_answer
    Three sources of equal intensities with frequencies 400,401 and 402 vib/s are sounded together. The number of beat/s is :

    A)  zero                                     

    B)  1

    C)  2                                            

    D)  4

    Correct Answer: C

    Solution :

                     Beats are the periodic and repeating fluctuations heard in the intensity of sound, when two sound waves of very similar frequencies interfere with one another. Beats = difference in frequencies. Maximum number of beats \[=402-400=2\]


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