List of top Physics Questions on Waves and Oscillations asked in AP ECET CSE, AP ECET CE

A siren emitting sound of frequency 800 Hz is going away from a static listener with a speed of 30 m/s. Frequency of sound heard by the listener is (Velocity of sound in air = 340 m/s)

The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be __________ when compared to that of one source is