question_answer

A wire of length L and mass per unit length \[6.0\times {{10}^{3}}\text{ }kg\text{ }{{m}^{1}}\] is put under tension of 540 N. Two consecutive frequencies that it resonates at are: 420 Hz and 490 Hz. Then L in meters is [JEE MAIN Held on 09-01-2020 Evening]

A)  1.1 m              

B)  5.1 m

C)  8.1 m              

D)  2.1 m