Q. In the fundamental mode, time taken by the wave to reach the closed end of the air filled pipe is 0.01s. the fundamental frequency is
A) 25
B) 12.5
C) 20
D) 15
Explanation
(a) In the fundamental mode.
$frequency\ \ \ \ \ \ \ \ n = \frac{v}{\lambda}$
$n = \frac{v}{4\iota}$
$n = \frac{1}{t \times 4\iota}\ \ \ \ \ \left( \because v = \frac{1}{t} \right)$
$n = \frac{1}{0.01 \times 4}$
$n = 25$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.