JEE Main 2022 Physics question
A tuning 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 )
Answer: 50
Solution
The wavelength is = v/f = 340/340 = 1 m = 100 cm. Successive resonances of the air column occur when its length
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