9th Class Science Sound Question Bank Sound HOTS Objective Problems

  • question_answer
    A section each of two sound waves is shown in the given figure.
    Which of the following equations is correct?

    A)  Wavelength of wave A = Wavelength of wave B

    B)  Amplitude of wave A > Amplitude of wave B

    C)  Frequency of wave A < Frequency of wave B

    D)  Amplitude of wave A < Amplitude of wave B

    Correct Answer: C

    Solution :

      The number of crests or troughs that pass a point per unit time is known as the frequency of a wave. The frequency of a wave is inversely proportional to its wavelength. It can be observed from the given figure that the wavelength of wave B is less than that of wave A i.e., the frequency of wave B is greater than that of wave A. The correct answer is C.


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