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9th Class Science Sound Question Bank Sound Summative Objective Problems

  • question_answer
    When Owen strikes two tuning forks with a hammer they produce melodious sounds. He feels that the sound produced by fork I is louder than that produced by fork n. The sound wave produced by fork II is shown in the given figure.
    Which figure shows the graphical representation of the sound produced by fork I?

    A)              

    B)  

    C)                 

    D)  

    Correct Answer: D

    Solution :

      The loudness of a sound wave is directly proportional to its amplitude. Therefore, the sound wave having higher amplitude is louder than the sound wave having lower amplitude. The sound produced by tuning fork II is louder than that produced by tuning fork I. Therefore, the amplitude of the sound wave produced by fork I is higher than that of the sound wave produced by tuning fork II. Only the wave given in alternative D has higher amplitude than the given wave. Therefore, the figure in alternative D shows the graphical representation of the sound produced by fork I. The correct answer is D.


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