Physics
Grade-8
Easy
Question
Sound is generated when an object ____ and is propagated when it is in a ____.
- Moves, air
- Moves, material medium
- Vibrates, material medium
- Vibrates, vacuum
Hint:
Sound is produced by a vibrating objects.
The correct answer is: Vibrates, material medium
- A vibrating object produces sound.
- Sound is a mechanical wave(propagating in a material medium).
- Sound is generated when an object vibrates and is propagated when it is in a material medium.
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Rarefactions are the regions where the ____ is low.
Rarefactions are the regions where the ____ is low.
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The particles of the medium do not actually move to carry the sound wave from one place to another. They simply vibrate about their equilibrium positions. This statement is ____.
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In the options given below, if ‘C’ means compression and ‘R’ means rarefaction figure out which of the patterns represent the pattern of particles of the medium through which sound propagates.
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The particles of the medium move from the origin of sound to the destination to carry it. This statement is ____.
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Sound waves are produced from an object which ____.
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