Three sources of equal intensities with frequencies 400,401 and 402 vib/s are sounded together. The number of beat/s is

Question

Three sources of equal intensities with frequencies 400,401 and 402 vib/s are sounded together. The number of beat/s is (A) zero (B) 1 (C) 2 (D) 3

Tardigrade Admin · Accepted Answer

Beats are the periodic and repeating fluctuations heard in the intensity of sound, when two sound waves of very similar frequencies interfere with one another.
Beats = difference in frequencies.
Maximum-number of beats

= 402 - 400 = 2

Q. Three sources of equal intensities with frequencies 400,401 and 402vib/s are sounded together. The number of beat/s is

zero

1

2

3

Beats are the periodic and repeating fluctuations heard in the intensity of sound, when two sound waves of very similar frequencies interfere with one another. Beats = difference in frequencies. Maximum-number of beats =402−400=2

Q. Three sources of equal intensities with frequencies $400, 401$ and $402 v ib / s$ are sounded together. The number of beat/s is

Beats are the periodic and repeating fluctuations heard in the intensity of sound, when two sound waves of very similar frequencies interfere with one another.
Beats = difference in frequencies.
Maximum-number of beats $= 402 - 400 = 2$