A) f = f
B) f = 4f
C) f = 2f
D) f = \[\frac{f}{2}\]
Correct Answer: A
Solution :
For fundamental frequency of vibration of air column \[l=\frac{\lambda }{2}\] \[\Rightarrow \] \[\lambda =2l\] Frequency, \[f=\frac{v}{\lambda }\] \[\Rightarrow \] \[f=\frac{v}{2l}\] ?(i) When tube is placed inside water with half-length immersed in water then \[\frac{l}{2}=\frac{\lambda }{4}\] \[\Rightarrow \] \[\lambda =2l\] Frequency \[f=\frac{v}{\lambda }=\frac{v}{2l}\] ...(ii) From Eqs. (i) and (ii), we get\[f=f\]You need to login to perform this action.
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