Question
A pipe open at both ends has a fundamental frequency f in the air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now:
-
f/2
-
3f/4
-
2f
-
f
Solution
D.
f
For open ends, fundamental frequency f in air
we have
When a pipe is dipped vertically in the water, so that half of it is in water, we have
Thus, the fundamental frequency of the air column is now,
f=f'
