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Class 10 Physics · Chapter 3 · Test 2

Test 2: Wave Speed, Properties of Waves, Seismic and Tsunami Waves

MCQs

30 questions · 25 min · 30 marks

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Sample questions

The first 5 of 30. Try each one, then tap to see the answer.

  1. Question 1

    The wave phenomenon which occurs when waves change direction due to a change in speed is:

    • Adiffraction
    • Breflection
    • Cabsorption
    • Drefraction
    Show answer

    Answer: D

    Refraction occurs when waves pass from one medium into another and change direction due to change in speed.

  2. Question 2

    What happens to wave speed and wavelength when a tsunami approaches shallow water?

    • ASpeed increases, wavelength increases
    • BSpeed decreases, wavelength shortens
    • CSpeed remains the same, wavelength shortens
    • DSpeed increases, wavelength stays constant
    Show answer

    Answer: B

    As the water becomes shallower the bottom of the wave touches the ocean floor, slowing it down, and the distance between crests becomes smaller.

  3. Question 3

    Which wave behaviour explains how sound is heard around a corner?

    • AReflection
    • BRefraction
    • CInterference
    • DDiffraction
    Show answer

    Answer: D

    Sound waves have relatively long wavelengths and diffract around corners and obstacles.

  4. Question 4

    The frequency of a wave is measured in:

    • Ahertz (Hz)
    • Bmetre (m)
    • Csecond (s)
    • Dmetre per second
    Show answer

    Answer: A

    1 Hz = 1 wave per second.

  5. Question 5

    The wave period T is related to frequency f by:

    • AT = f
    • BT = 1/f
    • CT = f²
    • DT = f/λ
    Show answer

    Answer: B

    The wave period is the inverse of frequency.

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