2. Questions Bank
  3. 9th Class
  4. Science
  5. Sound

9th Class Science Sound Question Bank Sound HOTS Objective Problems

  • question_answer
    A section of a wave is shown in the given figure.
    The points N, P, and R are respectively

    A)  crest, crest, and trough

    B)  crest, trough, and crest

    C)  trough, trough, and crest

    D)  trough, crest, and trough

    Correct Answer: B

    Solution :

      Crest is the section of a wave that is above the undisturbed position. Trough is the section of a wave that is below the undisturbed position. Hence, points N, P, and R are crest, trough, and crest respectively. The correct answer is B.


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