Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Easy-Class 11
A glass tube partially filled with water has its end in contact with water as a node and open end as an antinode. If the length of the tube is 1.5 m and the speed of sound in air is 331 m/s, what is the fundamental frequency of the tube?
A
55.17 Hz
B
110.34 Hz
C
165.51 Hz
D
220.68 Hz
Correct Answer
Option A
Detailed Explanation
The fundamental frequency occurs when the length of the tube, L, is equal to λ/4, where λ is the wavelength. The speed of sound equation v = λν gives ν = v/(4L). Substituting v = 331 m/s and L = 1.5 m gives ν = 331 / (4 * 1.5) = 55.17 Hz.
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