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Question

We find it difficult to hear if we put cotton in our ears. This is because

A
cotton damps the sound wave before reaching the ear drum
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B
cotton creates a vacuum in the ear
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C
cotton conducts the vibration to the ear drum
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D
none of the above is true
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Solution

The correct option is B cotton damps the sound wave before reaching the ear drum
Cotton act as a sound absorber so when we put it inside the ear, damps the vibration entering the ear. and when the damped sound reaches the eardrum, its vibration becomes lower than the original. So, we find it difficult to hear.

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