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JEE Physics · Medium

Sound Waves: Doppler Application MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Doppler ApplicationMediumQuestion 31265

Question

Same train moving away from observer: frequency heard is:
  1. A
    471 Hz
    Correct
  2. B
    533 Hz
  3. C
    481 Hz
  4. D
    450 Hz

Correct answer

471 Hz

Explanation

Source receding: f = 500×340/(340+20) = 500×340/360 = 472 Hz ≈ 471 Hz.

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