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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveWavesMedium2 minQB

PhysicsMediumnumerical

A 256 Hz source moves at 10 m/s towards a wall. A stationary observer stands on the side of the source away from the wall. Find the beat frequency he hears ( $v = 340$ m/s).

Answer:

15.10

Solution:

Direct sound (source receding): $256 \times \frac{340}{350}$ . Echo (source approaching the wall): $256 \times \frac{340}{330}$ . Beat = $256 \times 340 (\frac{1}{330} - \frac{1}{350}) = 15.1$ Hz.

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Waves

⏱ 2mℹ️ Source: QB

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