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Most Important Selected Qs for JEE AdvancedPhysicsWaves and Sound

A source of sound of frequency 1000 Hz is moving towards a stationary wall with velocity 30 ~m / s and observer is also moving behind the source with the same velocity. If the frequency band width detected by the observer is K 10^2 . There find the value of k :

Correct answer

2

Step-by-step solution

f₁=ff_w= C C-30 f= 330 300 1000 ~Hz f₂= C+v₀ C f_w= 360 330 330 300 1000=1200 ~Hz Frequency Band width = f ₂- f ₁=200 ~Hz

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