Q. What is the base frequency if a pipe gives notes of frequencies 425, 255 and 595 and decide whether it is closed at one end or open at both ends
A) 17, closed
B) 85, closed
C) 17, open
D) 85, open
Explanation
(b) Let the base frequency be $n$ for closed pipe then notes are $n,3n,5n\ldots.$
$\therefore$ note $3n = 255 \Rightarrow n = 85,$ note $5n = 85 \times 5 = 425$ note $7n = 7 \times 85 = 595$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.