Beats

When two tuning forks $A$and $B$ are sounded together a beat frequency of $3 \mathrm{Hz}$ is produced. When $B$ in waxed and again $A$ and $B$ are sounded together the beat frequency increased to $5 \mathrm{Hz}$. If the frequency $A$ of in $512 \mathrm{Hz}$, the frequency of fork $B$ (before it is waxed) maybe

A person riding on a source '$S$' of sound (frequency $48 \mathrm{Hz}$) moves in a medium (in which velocity of sound is $310 \mathrm{m} {\mathrm{s}}^{-1}$ ) with speed $10 \mathrm{m} {\mathrm{s}}^{-1}$ as shown towards a liquid reservoir (in which velocity of sound is $1240 \mathrm{m} {\mathrm{s}}^{-1}$). A detector '$D$' in the reservoir moves towards the free surface of the reservoir (along line $SD$) at a speed $20 \mathrm{m} {\mathrm{s}}^{-1}$. The sound produced by '$S$' gets reflected and transmitted at the free surface. Mark the INCORRECT statement(s) among the following, assuming the liquid in the reservoir stays still and calm.

There are four tuning forks, and one of them has frequency $553 \mathrm{Hz}$. By using any two forks at a time, the beat frequencies heard are $1,2,3,5,7,8$. Which of the following could be a possible set of frequencies of other three forks.

There are four tuning forks, and one of them has frequency $553 \mathrm{Hz}$. By using any two forks at a time, the beat frequencies heard are $1,2,3,5,7,8$. The possible frequencies of other three forks are

Two notes $A$ and $B$, sounded together, produce 2 beats per $\sec$. Notes $B$ and $C$ sounded together produces 3 beats per second. The notes A and C separately produce the same number of beats with a standard tuning fork of $456 \mathrm{Hz}$. The possible frequency of the note $B$ is

If the two frequencies of waves are $550\mathrm{Hz} \mathrm{and} 380\mathrm{Hz}$ respectively. The beat frequency is _____.

Two tuning forks have frequencies $450 \mathrm{Hz}$ and $454 \mathrm{Hz}$ respectively. On sounding these forks together, the time interval between two successive maximum intensities will be _____.

Two waves each of loudness $L$ superimpose to produce beats. The maximum loudness of beats will be

Two tuning forks have frequencies $450 \mathrm{Hz}$ and $454 \mathrm{Hz}$ respectively. On sounding these forks together, the time interval between two successive maximum intensities will be _____.

Two sound waves of wavelength $2 \mathrm{m}$ and $2.02 \mathrm{m}$ produce $15$ beat in $3 \mathrm{seconds}$ in a medium. The velocity of sound in that medium is

Two tuning forks have frequencies $300 \mathrm{Hz}$ and $308 \mathrm{Hz}$. When they are sounded together, after hearing the maximum sound, how long will it take to hear the first minimum sound?

Distinguish between stationary waves and beats.

Two sound waves having wavelengths of $87 \mathrm{cm}$ and $88.5 \mathrm{cm}$ respectively, when superimposed, produce $10$ beats per second. Find the velocity of the sound.

Describe Quincke's tube experiment to explain the phenomenon of beats.

Consider a source of frequency $X \mathrm{Hz}$. In an experiment with $250 \mathrm{Hz}, 270 \mathrm{Hz}$ sources, the source produces $8 \mathrm{beats}/\mathrm{s}, 12 \mathrm{beats}/\mathrm{s}$, respectively. Find $X=?$

A beat frequency of $10 \mathrm{Hz}$ is observed if a tuning fork is vibrated simultaneously with a string under a tension of $129.6 \mathrm{N}$. However, no beats are heard with the tuning fork when the tension in the string is increased to $160 \mathrm{N}$. Find out the fundamental frequency of the tuning fork.

For which of the following cases, does the phenomenon of beats can take place?

Musicians make use of which phenomenon with their musical instruments?

Two identical piano wires are kept under the same tension $\mathrm{T}$ and both have a fundamental frequency of $600 \mathrm{Hz}.$ What should be the fractional increase in the tension of one of the wires so that $6 \mathrm{beats}/\mathrm{s}$ are heard when both the wires oscillate together ?
 

Two tuning forks $\mathrm{A}$ and $\mathrm{B}$ are sounded together and it results in beats with frequency of $4$ beats per second. When $\mathrm{A}$ is loaded with wax, they again produces $4$ beats per second. If frequency of $\mathrm{A}$ is $256 \mathrm{Hz}$, then the  frequency of $\mathrm{B}$ is