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Question 31290
JEE Physics · Hard

Sound Waves: Doppler Advanced MCQ

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Doppler AdvancedHardQuestion 31290

Question

A source and observer both move at v_sound/2 in the same direction. Observed frequency:
  1. A
    f₀
    Correct
  2. B
    2f₀
  3. C
    f₀/2
  4. D
    3f₀

Correct answer

f₀

Explanation

Same direction, same speed: relative velocity = 0. No Doppler shift. f = f₀×(v+v₀)/(v+v_s) = f₀×(v+v/2)/(v+v/2) = f₀.

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