Q.
The frequency of the fundamental note in a wire stretched under tension T is v. if the tension is increased to 25T, then the frequency of the fundamental note will be
A) 25v
B) 5v
C) 10v
D) V
Explanation
(b) The fundamental frequency
$v = \frac{1}{2L}\sqrt{\frac{T}{m}}$
$\therefore\ \ \ \frac{v^{'}}{v} = \sqrt{\frac{T^{'}}{T}} = \sqrt{\frac{25T}{T}} = 5$
Or $v^{'} = 5v$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.