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9th Class Science Sound Question Bank Sound Conceptive Objective Problems

  • question_answer
    The frequency of a wave travelling at a speed of 500m/s is 25 Hz. Its time period will be

    A)  20 s                      

    B)  0.05 s   

    C)  25 s                      

    D)  0.04 s

    Correct Answer: D

    Solution :

      \[f=25\text{ }Hz\]            \[v=500\text{ }m/s\text{ }T=?\] We know, \[T=\frac{1}{f}=\frac{1}{25}=0.04s\]


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