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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A travelling wave represented by $y = A \sin (ω t - k x)$ is superimposed on another wave represented by $y = A \sin (ω t + k x)$ . The resultant is:

Options:

Answer:

Solution:

From given progressive waves produced stationary wave

$y_{s w} = A [\sin (w t - k x) + \sin (w t + k x)]$

$y_{s w} = 2 A \cos k x \sin w t$

At $x = 0, \frac{λ}{2}, λ \dots \Rightarrow y_{s w} = 2 a =$ Antinode

At $x = \frac{λ}{4}, \frac{3 λ}{4} . . \Rightarrow y_{s w} = 0 =$ Nodes

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Sound WaveSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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