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J & K CET Engineering J and K - CET Engineering Solved Paper-2015

  • question_answer
    An observer standing near the sea-coast counts 48 waves per min. If the wavelength of the wave is \[10\text{ }m,\] the velocity of the waves will be

    A) \[8\,\,m/s\]             

    B) \[12\,\,m/s\]

    C) \[16\,\,m/s\]            

    D) \[20\,\,m/s\]

    Correct Answer: A

    Solution :

    According to the question, Frequency, \[v=\frac{48}{60}Hz=\frac{4}{5}=0.8\,Hz\] Wavelength,  \[\lambda =10\,m\] \[\therefore \] Wave velocity, \[v=v\lambda =(0.8)(10)\] \[=8m/s\]


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