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9th Class Science Sound Question Bank Sound Formative Objective Problems

  • question_answer
    The velocity of sound in air is 344 m/sec. What is the wavelength of a sound wave of frequency 32Hz?

    A)  9.75 m                                 

    B)  10.75 m

    C)  7.25 m                                 

    D)  8.25 m

    Correct Answer: B

    Solution :

      \[v=344\text{ }m/s,\] \[f=32Hz,\] \[\lambda =?\]We know, \[V=f\lambda \]               \[\therefore \]\[\lambda =\frac{v}{f}=\frac{344}{32}=10.75\,,m\]


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