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QJEEM22Ph5725: JEE Main 2022 Physics - Class 11 JEEM22Ph5725 Solution: A tunning fork of frequency 340 Hz resonates in the fundamental …

A tunning fork of frequency 340 Hz resonates in the fundamental mode with an air column of length 125 cm in a cylindrical tube closed at one end. When water is slowly poured in it, the minimum height of water required for observing resonance once again is ___________ cm.

(Velocity of sound in air is 340 ms−1)

Step-by-Step Verified Solution

Given 340=n4×125v

⇒n=5

So λ=100 cm

So minimum height is λ2=50 cm

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