NEET2015Physics-Waves
NEET 2015 Physics Sound Waves MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open on both ends. The length of organ pipe open at both the ends is
A
80 cm
B
100 cm
C
120 cm
D
140 cm
Correct Answer
Option B
Detailed Explanation
The fundamental frequency of a closed pipe is and the second overtone of an open pipe is . Equating and solving gives the length of the open pipe as 80 cm.
Found an issue with this question?