Q. Three sources of equal intensities with frequencies 400, 401 and 402 vib/s are sounded together. The number of beats/s is
A) Zero
B) 1
C) 2
D) 4
Explanation
(c) Beats are the periodic and repeating functions heard in the intensity of sound, when two sound waves of very similar frequency interface with ine another.
Beats = defference in frequencies.
Maximum number of beats =402-400=2
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.