Q. 74.9( 7 Votes )

“Vibrations in a

Answer :

Vibrations in a body produce sounds. This can be proved by the following activities:

(a) We Take a brass bell. Ring the bell and listen to the sound carefully. Also, if we gently touch the bell, we feel the vibrations in the bell. Now we hold the bell tightly with hand and ring it again. In this case we feel no vibration and no clear and loud sound.

(b) We Fix a rubber band tightly on an empty matchbox. Now we Pluck the rubber band and keep it close to our ear. We clearly hear some sound coming out of it. Also, as soon as band stops vibrating sound also vanishes.

(c) Blow air into papers of our notebook. By doing so we observe that air makes its way through pages of the notebook, resulting due to the vibrations produced due to blowing air and we hear some papery sound.

The above-mentioned activity clearly shows that vibration is always associated with the production of sound and as soon as the vibration stops the production of sound also stops simultaneously. Hence it proves that Vibrations in a body produce sounds.

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