MHT CET 2022 Physics question
A cylindrical tube open at both ends has fundamental frequency 'f' in air. When the tube is dipped vertically in water so that one-third part of the tube is in water, the fundamental frequency of air column becomes (neglect end correction)
Answer: (D)
Solution
Let the tube length be . Open at both ends: . When one-third of the tube is immersed, the air column is and it is now closed at the water end and open at the other, so the fundamental is \dfrac{v}{4L'}\dfrac{v}${4 ยท
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