A source of frequency 500 Hz moves at 20 m/s towards a stationary observer. The speed of sound is 340 m/s. The observed frequency is:

  1. 531 Hz
  2. 584 Hz
  3. 500 Hz
  4. 472 Hz
Answer

A) 531 Hz

fo = fs vv - vs = 500 340340 - 20 = 531 Hz. SLO P-11-D-03 · Application

Physics MCQ · More Wave Intensity and the Doppler Effect MCQs · Practise