The percentage increase in the speed of transverse waves produced in a stretched string if the tension is increased by $4\, \%$, will be ......... $\%$
JEE MAIN 2021, Medium
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$v =\sqrt{\frac{ T }{\mu}}$
$\frac{\Delta V }{ V }=\frac{1}{2} \frac{\Delta T }{ T }$
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