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

9th Class Science Sound Question Bank Sound Conceptive Objective Problems

  • question_answer
    Noise is produced by

    A)  irregular and periodic vibrations

    B)  regular vibrations

    C)  regular and periodic vibrations

    D)  irregular and non-periodic vibrations

    Correct Answer: D

    Solution :

      Noise is produced by irregular and non?periodic vibrations.


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