Question

A burette is filled with water upto its neck and clamped vertically in an iron stand. The water is allowed to trickle drop by drop in a beaker and a vibrating tuning fork is held above the neck of the burette. It is observed that at some particular depth the loudness of sound of the tuning fork rises. The phenomenon which takes place is:

Options

• Forced vibrations

• Free vibrations

• Resonance

• Reverberations

Answer 1

Resonance

Explanation:

As the water level falls, the length of the air column changes. At a particular length, the air column's natural frequency matches the tuning fork's frequency, so resonance produces a louder sound.