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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveBeatsEasy2 minPYQ_2020

PhysicsEasysingle choice

A closed organ pipe and an open pipe of same length produce 2 beats $s^{- 1}$ when they are set into vibrations together in fundamental mode. The length of open pipe is now halved and that of closed pipe is doubled. The number of beats produced will be

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Answer:

Solution:

$n_{c} = \frac{v}{4 l}, n_{0} = \frac{v}{2 l}$

As $n_{0} - n_{c} = 2$

$∴ \frac{v}{2 l} - \frac{v}{4 l} = 2 o r \frac{v}{l} = 8$

Now

Number of beats $s^{- 1} = n_{0}^{'} - n_{c}^{'}$

$= \frac{v}{l} - \frac{v}{8 l} = \frac{7 v}{8 l} = \frac{7}{8} \times 8 = 7$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Sound WaveSubtopic:Beats

⏱ 2mℹ️ Source: PYQ_2020

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