Question

A vibrating tuning fork is placed over the mouth of a burette filled with water.
The tap of the burette is opened and the water level gradually starts falling. It is
found that the sound from the tuning fork becomes very loud for a particular
length of the water column.
(i) Name the phenomenon taking place when this happens.
(ii) Why does the sound become very loud for this length of the water
column?

Answer 1

Resonance.
The sound becomes very loud for this length of the water because the natural frequency matches with the forced vibrations.
# A student of class 10 ICSE.
# hope it helps.

Answer 2

Answer:

here is your answer...

[i] the phenomenon which occurs is Resonance.

[ii] The sound becomes very loud for this length because the frequency of the air column becomes equal to the natural frequency of the tuning fork.

Explanation:

Resonance describes the phenomena of amplification that occurs when the frequency of a periodically applied force is in harmonic proportion to a natural frequency of the system on which it acts. When an oscillating force is applied at a resonant frequency of a dynamical system, the system will oscillate at a higher amplitude than when the same force is applied at other, non-resonant frequencies.