NEET Physics MCQs

A tuning fork of frequency 512 Hz makes 4 beats per second with another tuning fork. When a small piece of wax is attached to the second fork, the number of beats increases to 6 beats per second. The original frequency of the second fork is:

Two tuning forks $A$ and $B$ vibrating simultaneously produce $5$ beats. Frequency of $B$ is $512$. It is seen that if one arm of $A$ is filled, then the number of beats increases. Frequency of $A$ will be

A tuning fork $A$ produces $4\,\,beats/\sec$ with another tuning fork $B$ of frequency $320\,\,Hz$. On filing the fork $A$, $4\,\,beats/\sec$ are again heard. The frequency of fork $A$, after filing is

Two tuning fork $P\,\,and\,\,{\rm{Q}}$ when set vibrating give $4{\mkern 1mu} {\mkern 1mu} \,beats/s$. if a prong of the fork $P$ is filed the beats are reduced to $2\,\,{s^{ - 1}}$. What is frequency of $P$, if that of $Q$ is $250\,\,Hz$?

When $2$ tuning forks (fork 1 and fork 2) are sounded simultaneously, $4$ beats ${{\rm{s}}^{ - 1}}$ are heard. Now, some tape is attached on the prong of fork $2$. When the tuning forks are sounded again, $6$ beats ${{\rm{s}}^{ - 1}}$ are heard if the frequency of fork $1$ is $200\,\,Hz$, then what was the original frequency of fork $2$?

In the experiment to determine the speed of sound using a resonance column

In the experiment to determine the speed of sound using a resonance column

Which of the following combinations should be selected for better tuning of an $L - C - R$ circuit used for communication?