Two tuning forks A and B are sounded together | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The beat frequency is the number of beats per second. Initially, $8$ beats in $2$ s means the beat frequency is $f_{beat} = 8/2 = 4$ Hz.This impli

Vedclass · Accepted Answer

$384$

Vedclass · Answer

(A) The beat frequency is the number of beats per second. Initially, $8$ beats in $2$ s means the beat frequency is $f_{beat} = 8/2 = 4$ Hz.This implies $|f_A - f_B| = 4$ Hz.Given $f_B = 380$ Hz, so $|f_A - 380| = 4$, which means $f_A = 384$ Hz or $f_A = 376$ Hz.When tuning fork $A$ is loaded with wax, its frequency $f_A$ decreases.After loading, the new beat frequency is $4$ beats in $2$ s,which is $f'_{beat} = 4/2 = 2$ Hz.If $f_A$ was $376$ Hz, loading it would decrease it further away from $380$ Hz, increasing the beat frequency.If $f_A$ was $384$ Hz, loading it would decrease it towards $380$ Hz, reducing the beat frequency to $2$ Hz.Therefore, the original frequency of tuning fork $A$ must be $384$ Hz.

Two tuning forks $A$ and $B$ are sounded together giving rise to $8$ beats in $2$ s. When fork $A$ is loaded with wax, the beat frequency is reduced to $4$ beats in $2$ s. If the original frequency of tuning fork $B$ is $380$ Hz, then the original frequency of tuning fork $A$ is . . . . . . Hz.

Similar Questions

The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be ...... that of one source.

When two tuning forks $A$ and $B$ are sounded together, $4$ beats per second are heard. The frequency of the fork $B$ is $384 \,Hz$. When one of the prongs of the fork $A$ is filed and sounded with $B$, the beat frequency increases. Then the frequency of the fork $A$ is: (in $\,Hz$)

When two waves of almost equal frequencies $v_1$ and $v_2$ reach a point simultaneously,the time interval between successive maxima is

Vedclass Test Series

Exam Paper Generator

Online Exam Module