A train is moving on a straight track with speed 20 ms^(-1). It is | Filo
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class 12

Physics

Waves & Oscillation

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A train is moving on a straight track with speed . It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound ) close to :

  1. 12%
  2. 18%
  3. 24%
  4. 60%
Correct Answer: Option(a)
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