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  3. J & K CET Engineering

J & K CET Engineering J and K - CET Engineering 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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