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9th Class Science Sound Question Bank Sound Summative Objective Problems

  • question_answer
    Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium.

    A)  3 m                                       

    B)  5 m

    C)  2 m                       

    D)  4 m

    Correct Answer: C

    Solution :

      Given, \[f=200\text{ }Hz\] \[v=440\text{ }m/s\] \[\lambda =?\] We know, \[v=f\lambda \] \[\Rightarrow \]\[\lambda =\frac{v}{f}=\frac{440}{220}=2m\]    


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