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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveBeatsEasy2 minPYQ_2020

PhysicsEasysingle choice

A tuning fork of frequency 480 Hz produces 10 beats $s^{- 1}$ when sounded with a vibrating sonometer string. What must have been the frequency of string if slight increase in tension produces fewer beats $s^{- 1}$ than before?

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Answer:

Solution:

Here $n_{1} = 480, m = 10$

$n_{2} = n_{1} \pm m = 480 \pm 10 = 490 o r 470$

When tension is increased, $n_{2}$ will increase

$(∴ n_{2} \propto \sqrt{T})$ .

As number of beats $s^{- 1}$ decrease, $n_{2} = 470 H z$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Sound WaveSubtopic:Beats

⏱ 2mℹ️ Source: PYQ_2020

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