Draw graphs of beats produced by two harmonic waves of frequency $11 \ Hz$ and $9 \ Hz$.
(N/A) The time-displacement graphs of two waves of frequency $11 \ Hz$ and $9 \ Hz$ are shown in figure $(a)$ and $(b)$.
The result of their superposition is shown in figure $(c)$.
Beats are the periodic variation in intensity at a given point due to the superposition of two sound waves of slightly different frequencies. The beat frequency is given by $f_{beat} = |f_1 - f_2| = |11 \ Hz - 9 \ Hz| = 2 \ Hz$. This means there are $2$ beats per second.
The result of their superposition is shown in figure $(c)$.
Beats are the periodic variation in intensity at a given point due to the superposition of two sound waves of slightly different frequencies. The beat frequency is given by $f_{beat} = |f_1 - f_2| = |11 \ Hz - 9 \ Hz| = 2 \ Hz$. This means there are $2$ beats per second.
Explore More
Similar Questions
Two tuning forks with frequencies $380 \,Hz$ and $384 \,Hz$ are sounded together. They produce $4$ beats per second. What is the time interval between the maximum sound and the next minimum sound?
Medium
View SolutionTwo identical wires have the same fundamental frequency of $400 \text{ Hz}$ when kept under the same tension. If the tension in one wire is increased by $2\%$,the number of beats produced will be
Medium
View SolutionTwo perfectly identical wires are in unison. When the tension in one wire is increased by $1\%$,then on sounding them together $3$ beats are heard in $2 \,s$. The initial frequency of each wire is .... $\text{s}^{-1}$.
Easy
View SolutionThe speed of sound in a gas,in which two waves of wavelength $1.0\, m$ and $1.02\, m$ produce $6$ beats per second,is approximately .... $m/s$
Medium
View SolutionTwo sitar strings $A$ and $B$ playing the note $'Ga'$ are slightly out of tune and produce beats of frequency $6 \ Hz$. The tension in the string $A$ is slightly reduced and the beat frequency is found to reduce to $3 \ Hz$. If the original frequency of $A$ is $324 \ Hz$,what is the frequency of $B$ in $Hz$?
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo