Physics

9th -

10thgrade

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IGCSE Physics MCQs 12 - Sound

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  • 1. Multiple Choice
    30 seconds
    1 pt

    What is ultrasound?

    sound waves that are so loud that they damage human hearing

    sound waves that are too high-pitched for humans to hear

    sound waves that are too low-pitched for humans to hear

    sound waves that are too quiet for humans to hear

  • 2. Multiple Choice
    30 seconds
    5 pts
    Image

    In the diagram, the mountaineer can hear the stream although he cannot see it. When he is closer to the gully, he can both hear and see the stream. When he is further from the gully, he can neither hear nor see the stream.

    Which statement is NOT correct?

    As he approaches the gully edge, the sound becomes louder.

    As he approaches the gully edge, he hears first the short wavelength, higher frequencies and then the long wavelength, lower frequencies.

    He hears the stream because some of the sound is diffracted.

    He hears the stream because some of the sound is reflected from the opposite wall of the gully.

  • 3. Multiple Choice
    30 seconds
    5 pts
    Image

    The diagrams show examples of wave motion. Which waves are longitudinal?

    1 only

    2 and 3 only

    2, 3, and 4

    2, and 4 only

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