NEET Physics Waves Questions Solved

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An empty vessel is partially filled with water, then the frequency of vibration of air column in the vessel 

(1) Remains same

(2) Decreases

(3) Increases

(4) First increases then decreases

(3) For closed pipe in general n=v4l(2N1)n1l

i.e. if length of air column decreases frequency increases.

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