Home Physics Wave and Sound Doppler’s Effect A motor car blowing a horn of frequency 124v…
Physics Wave and Sound Doppler’s Effect MCQ (Single Correct)

A motor car blowing a horn of frequency 124vib/sec moves with a velocity 72 km/hr towards a tall wall. The frequency of the reflected sound heard by the driver will be (velocity of sound in air is 330 m/s)

A
109 vib/sec
B
132 vib/sec
C
140 vib/sec
D
248 vib/sec

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The correct answer is:
C

Similar to previous question

The frequency of reflected sound heard by the driver

= 140 vibration/sec.

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