A police car with a siren of frequency 8 kHz is moving with uniform velocity of 36 km/h…
Physics · JEE Main · NTA Exams — Oscillations and Waves
A police car with a siren of frequency 8 kHz is moving with uniform velocity of 36 km/h 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:
- 8.50 kHz
- 8.25 kHz
- 7.75 kHz
- 7.50 kHz
Answer
(A) 8.50 kHz
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