defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Waves Doppler effect

A man is running with a velocity of 100m/s towards a stationary car which is giving a horn of frequency 30 Hz. Find the frequency heard by the man if speed of wave in air is 300m/s.

1

30 Hz

2

40 Hz

3

45 Hz

4

50 Hz

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