MHT CET Physics question
A resonance tube closed at one end is of height 1.5 m. A tuning fork of frequency 340 Hz is vibrating near the open end of the tube. Water is poured in the tube gradually. The minimum height of water column for which resonance is obtained is (neglect end correction, speed of sound in air = 340 m/s) [MHT-CET 2011]
Answer: (C)
Solution
m, so resonant air columns are 25, 75 and 125 cm (the next, 175 cm, exceeds the tube); the least water height is cm, whereas 75 cm of water
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