Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveBeatsEasy2 minPYQ_2020

PhysicsEasysingle choice

Two sound waves of wavelengths $98 c m$ and $100 c m$ arrive at the same point, from two different sources. If the speed of sound in the medium is $392 m s^{- 1}$ , then the number of beats heard is

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Answer:

Solution:

The beat frequency = $| f_{1} - f_{2} |$ , where $f = \frac{c}{λ}$

$f_{beat} = |\frac{392}{0.98} - \frac{392}{1}| Hz$

$f_{beat} = 8 Hz$

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Beats

⏱ 2mℹ️ Source: PYQ_2020

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