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प्रश्न
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.
(i) What change takes place in the sound to give this idea?
(ii) What causes the change in the sound?
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उत्तर
(i) As the bucket is filled the sound gradually increases.
(ii) Frequency ∝ 1/length; Resonance takes place.
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