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9th Class Science Sound Question Bank Sound IIT JEE Objective Problems

  • question_answer
    In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.170s. The frequency of the wave is

    A)  1.47 Hz                

    B)  0.36 Hz

    C)  0.73 Hz                                

    D)  2.94 Hz

    Correct Answer: A

    Solution :

      As \[t=T/4\text{ },\text{ }T=4t=4\times 0.17=0.68s\] \[n=?\] Now,     \[n=1/T\]                 \[=1/0.68\]                 \[=1.47Hz.\]


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