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  3. 9th Class
  4. Science
  5. Sound

9th Class Science Sound Question Bank Sound Formative Objective Problems

  • question_answer
    Calculate the wavelength of the wave generated by a tuning fork of frequency 256 Hz. velocity of sound in air at ordinary conditions is 340 m/s.

    A)  1.33 m     

    B)  2.3 m

    C)  0.1 m                   

    D)  0.3 m

    Correct Answer: A

    Solution :

                      \[f=256Hz,\text{ }v=340\text{ }m/s\text{ }since\]             \[v=f\lambda \] \[\Rightarrow \]\[\lambda =\frac{v}{f}=\frac{340}{256}=1.33m\]              


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