1.

A cylinderical tube open at both ends, has a fundamental frequency f in air. The tube is dipped vertically in water so that half of it is in water. The fundamental frequency of air column is nowA. n/2B. nC. 2nD. 4n

Answer» Correct Answer - B
`n_1=n " " l_2=l/2`
`n_2/n_1 = (v)/(4l//2) (2l)/(v) = 1`
`n_2 = n_1 =n`
Since when the tube is dipped in water it acts as open at one end closed to the other end.


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