Q. The fundamental frequency of a string stretched with a weight of 4 kg is 256 Hz. The weight required to produce its octave is
A) 16 kg-wt
B) 12 kg-wt
C) 24 kg-wt
D) 4 kg-wt
Explanation
(a) As $n \propto \sqrt{T}$
$\therefore$ To produce octave of the note (of double the frequency), $T$ has to be made 4 times, $ie$, weight required $= 4 \times 4kg = 16kg$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.