A source of frequency 1000 Hz moves at 30 m/s towards a stationary observer. The speed of sound is 330 m/s. The observed frequency is:

  1. 917 Hz
  2. 1000 Hz
  3. 1100 Hz
  4. 1210 Hz
Answer

C) 1100 Hz

fo = fs vv - vs = 1000 330330 - 30 = 1100 Hz. SLO P-11-D-03 · Application

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