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9th Class Science Sound Question Bank Sound Conceptive Objective Problems

  • question_answer
    The wavelength of a sound wave is 66m, calculate the frequency of the wave if the velocity of sound is 330 m/s.

    A)  1.5 Hz                  

    B)  10 Hz

    C)  5 Hz      

    D)  7 Hz

    Correct Answer: C

    Solution :

      \[\lambda =66m\] \[f=?\] \[v=330\text{ }m/s\] We know that \[v=f\lambda \] \[\Rightarrow \]\[f=\frac{V}{\lambda }=\frac{330}{66}=5Hz\]     


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