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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveStanding waveMedium2 minPYQ_2021

PhysicsMediumsingle choice

A tuning fork of frequency ' $n$ ' is held near the open end of tube which is closed at the other end and the length are adjusted until resonance occurs. The first resonance occurs at length $L_{1}$ and immediate next resonance occurs at length $L_{2}$ . The speed of sound in air is

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Solution:

For first resonance $L_{1} = \frac{λ}{4}$ For second resonance $L_{2} = \frac{3 λ}{4}$ $∴ L_{2} - L_{1} = \frac{λ}{2} or λ = 2 (L_{2} - L_{1}) V = n λ = 2 n (L_{2} - L_{1})$

Stream:MHT_CETSubject:PhysicsTopic:Sound WaveSubtopic:Standing wave

⏱ 2mℹ️ Source: PYQ_2021

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