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Byju's Answer

Standard VIII

Physics

Characteristics of Sound

A tuning fork...

Question

A tuning fork of unknown frequency produces 4 beats per second when sounded with another tuning fork of frequency 254 Hz. It gives the same number of beats per second when unknown tuning fork loaded with wax. The unknown frequency before loading with wax is

258

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254

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250

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Can't be determine

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Solution

The correct option is B 258
$\begin{matrix} f_{1} - 254 = 4 254 - f_{2} = 4 \Rightarrow f_{1} = 258 \Rightarrow f_{2} = 250 \end{matrix}$
The unknown frequency before loading with wax is $258$
Hence,
option $A$ is correct answer.

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A tuning fork of unknown frequency produces 4 beats per second when sounded with another tuning fork of frequency 254 Hz. It gives the same number of beats per second when unknown tuning fork loaded with wax. The unknown frequency before loading with wax is

The correct option is B 258f1−254=4254−f2=4⇒f1=258⇒f2=250The unknown frequency before loading with wax is 258Hence,option A is correct answer.

The correct option is B 258
$\begin{matrix} f_{1} - 254 = 4 254 - f_{2} = 4 \Rightarrow f_{1} = 258 \Rightarrow f_{2} = 250 \end{matrix}$
The unknown frequency before loading with wax is $258$
Hence,
option $A$ is correct answer.