Home Physics Wave and Sound Doppler’s Effect A police car with a siren of frequency 8 kHz…
Physics Wave and Sound Doppler’s Effect MCQ (Single Correct)

A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the sound waves. The speed of sound in air is 320 m/s. The frequency of the siren heard by the car driver is

A
8.50 kHz
B
8.25 kHz
C
7.75 kHz
D
7.50 kHz

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The correct answer is:
A

Apart frequency of sound heard by car driver (observer)

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