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9th Class Science Sound Question Bank Sound

  • question_answer
    The time period of a periodic wave is\[0.02\] seconds. At a particular position there is a crest at\[t=0\]. At what value of \['t'\] will the next trough appear at this position?

    A) \[0.05\,\,s\]                    

    B) \[0.01\,\,s\]  

    C) \[0.15\,\,s\]        

    D)        \[0.25\,\,s\]

    Correct Answer: B

    Solution :

    The time period of a periodic wave i.e., the time difference between two consecutive crests is\[0.02\,\,s\]. The time difference between a crest and the next trough will be half the time period, i.e.\[0.01\,\,s\].


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