Two tuning forks having frequency 256, Hz ,(A) and 262, Hz ,(B) tuning fork. A produces some beats p

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14.Waves and Sound

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Two tuning forks having frequency $256\, Hz \,(A)$ and $262\, Hz \,(B)$ tuning fork. $A$ produces some beats per second with unknown tuning fork, same unknown tuning fork produce double beats per second from $B$ tuning fork then the frequency of unknown tuning fork is :- ............ $\mathrm{Hz}$

A

$262$

B

$260$

C

$250$

D

$300$

Solution

$C_{1} A C_{2} B$

$f_{1} 256 H z f_{2} 262 H z$

$2\left(f_{1}-256\right)=\left(f_{1}-262\right) \Rightarrow f_{1}=250 H z$

Standard 11

Physics

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