MHT CET 2022 Physics question
The frequency of vibrating are column in a pipe, open at both ends if 'f'. When th of its length is impressed in water, the frequency of vibrating air column is 'f'. The value of is
Answer: (B)
Solution
For a pipe of length open at both ends the fundamental frequency is . When of its length is immersed in water, the air column left is , and it is open at the top and closed (by water) at the bottom, i.e. a closed pipe.
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