Question icon
Grade 12th passAlgebra

A string is stretched between fixed points separated by 75 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is :-

Profile image of anashwara
7 Years agoGrade 12th pass
Answers icon

1 Answer

Profile image of Arun
7 Years ago
Dear student
Given nv/2l=315 and (n+1)v/2l=420
by solving the above equations we get v/2l=105 hz
 
Regards
Arun (askIITians forum expert)