NEET2014Physics-Waves
NEET 2014 Physics Sound Waves in Pipes MCQ Question
Type: MCQ-numerical-Medium-Class 11
The number of possible natural oscillations of air column in the pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz. are (Velocity of sound = 340 m/s.)
A
12
B
8
C
6
D
4
Correct Answer
Option C
Detailed Explanation
For a pipe closed at one end, the frequencies are given by fₙ = (2n - 1)v/4L. Solving for n with fₙ < 1250 Hz gives n = 6.
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