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In the experiment for the determination of the speed of sound in air using the resonance column method, the length of the air column that resonates in the fundamental mode with a tuning fork is 0.6 m. When this length is changed to  0.45 m the same tuning fork resonates with the first overtone calculate the end correction


 

Option: 1

-0.475 m


Option: 2

0.475 m


Option: 3

0.675 m


Option: 4

-0.675 m


Answers (1)

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e+60=\frac{\lambda }{4}\rightarrow e q\text { (1) } \\
e+45=\frac{3\lambda }{4} \rightarrow e q(2)

dividing by eq (1) and (2)

\frac{e+60}{e+45}=\frac{\frac{\lambda }{4}}{\frac{3 \lambda}{4}}

\frac{e+60}{e+45}=\frac{\lambda }{4} \times \frac{4}{3 \lambda} \\

\frac{e+60}{e+45}=\frac{1}{3}

(e+60) 3=e+45 \\

3 e+180=e+45 \\

3 e-e=45-180 \\

2 e=-135 \\

e=\frac{-135}{2} \mathrm{~cm}

 or\,\,\,e=\frac{-135}{2 \times 100}=\frac{-135}{200} \\

e=-0.675 \mathrm{~m}

Posted by

Ajit Kumar Dubey

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