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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveWavesMedium2 minQB

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A tuning fork of frequency 340 Hz is vibrated just above the tube of 120 cm height. Water is poured slowly in the tube. What is the minimum height of water necessary for the resonance (speed of sound in the air = 340 m/sec):

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Answer:

Solution:

$λ = 340/340 = 1$ m. Resonance occurs when the air column is $λ /4 = 25$ cm or $3 λ /4 = 75$ cm (125 cm exceeds the tube). The first resonance met while pouring is at air column 75 cm, so the water height is $120 - 75 = 45$ cm.

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Waves

⏱ 2mℹ️ Source: QB

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