JEE Advanced 2011 Physics question
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
Answer: (A)
Solution
Speed of the car m/s, speed of sound m/s. Step 1, the building receives sound from a source approaching it: kHz. Step 2, the building reflects this frequency, and the
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account