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PhysicsSound WaveBeatsHard2 minPYQ_2018
PhysicsHardsingle choice

Two sitar strings,AandBplaying the note 'Dha' are slightly out of tune and produce beats of frequency5 Hz. The tension of the stringBis slightly increased and the beat frequency is found to decrease by3 Hz. If the frequency ofAis425 Hz. The original frequency ofBis

Options:

Answer:
D
Solution:

The frequency ofBis either420 Hzor 430 Hz. As, the tension inBis increased its frequency will increase. If the frequency is430 Hz, the beat frequency will increase. If the frequency is420 Hzbeat frequency will decrease, hence the correct answer is420 Hz.

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Beats
2mℹ️ Source: PYQ_2018

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