Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveStanding waveEasy2 minPYQ_2020

PhysicsEasysingle choice

The respective displacements (in $cm$ ) of two particles of a medium disturbed by a wave propagation at $x_{1} = 0$ and $x_{2} = 1 cm$ are given by the equations: $y_{1} = 2 \sin 3 πt$
$y_{2} = 2 sin (3 π t - π / 8)$

The speed of the wave is

Options:

Answer:

Solution:

Given $ω=3π$

$∴ f= \frac{ω}{2π} =1.5$

Also $Δx=1.0 cm$

Given $ϕ = \frac{2π}{λ} Δx \Rightarrow \frac{π}{8} = \frac{2π}{λ} ×1$

$\Rightarrow λ=16 cm \Rightarrow {v=fλ=16×1.5=24 cm sec}^{- 1}$

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Standing wave

⏱ 2mℹ️ Source: PYQ_2020

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