ICSE Class 10 Physics 2013 Solved Paper

A bucket kept under a running tap is getting filled with water. A person sitting at a distance is able to get an idea when the bucket is about to be filled.

Question : 18 of 70

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What change takes place in the sound to give this idea?

Solution:

As the bucket is filled, the length of air column decrease. The frequency of sound appear to be increase

(f ∝ \;{1}/{l})

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