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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveDopler's effectEasy2 minPYQ_2020

PhysicsEasysingle choice

An observer moves towards a stationary source of sound with a speed ${\frac{1}{5}}^{t h}$ of the speed of sound. The wavelength and frequency of the source emitted are $λ$ and $f$ respectively. The apparent frequency and wavelength recorded by the observer are respectively

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Answer:

Solution:

Apparent frequency, $f^{'} = \frac{v + v_{0}}{v} f$
$\Rightarrow f^{'} = \frac{v + (1 / 5) v}{v} f = 1.2 f$
Wavelength does not change by motion of observer.

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Sound WaveSubtopic:Dopler's effect

⏱ 2mℹ️ Source: PYQ_2020

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