A) \[2f\]
B) \[3f/2\]
C) \[f\]
D) \[f\]/2
Correct Answer: C
Solution :
Key Idea: When open end pipe is dipped in water vertically it becomes close end pipe. Fundamental frequency of open pipe,\[f=\frac{v}{2l}\] ???(i) When half length of tube is dipped vertically in water, then length of the air column becomes half \[\left( l=\frac{l}{2} \right)\] and the pipe becomes closed. So, new fundamental frequency of closed pipe \[f=\frac{v}{4l}=\frac{v}{4\left( \frac{l}{2} \right)}=\frac{v}{2l}\] ??(ii) From Eqs. (i) and (ii), we get, \[f=f\] Hence, there will be no change in frequency.You need to login to perform this action.
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