A source of sound gives 5 beats $s^{- 1}$ when sounded with another source of frequency 100 Hz. The second harmonic of the source together with a source of frequency 205 Hz gives 5 beats $s^{- 1}$. What is the frequency of the source?

Question

Dr. Abubacker · Accepted Answer

(a) Two possible frequencies of source are $= 100 \pm 5 = 105\ or\ 95$
Frequency of 2nd harmonic$\  = 210\ or\ 190$
5 beats with source of frequency 205 are possible only when 2nd harmonic has frequency$= 210$
$	herefore$ Frequency of source $= 105\ Hz$

Q. A source of sound gives 5 beats $s^{- 1}$ when sounded with another source of frequency 100 Hz. The second harmonic of the source together with a source of frequency 205 Hz gives 5 beats $s^{- 1}$. What is the frequency of the source?

Explanation

Reviewed by Dr. Abubacker

Want more practice?