A pipe of length 45cm is closed at the end. Calculate the fundamental frequency of...
PHYSICS
JAMB 1994
A pipe of length 45cm is closed at the end. Calculate the fundamental frequency of the sound wave generated in the pipe if the velocity of sound in air is 360ms-1 [Neglect end correction]
- A. 5.5Hz
- B. 148.5Hz
- C. 200.0Hz
- D. 550.0Hz
Correct Answer: C. 200.0Hz
Explanation
\(\lambda\) = 4L = 4 X 45 = 180cm
F = \(\frac {V}{\lambda}\)
= \(\frac {360}{180 \times 10^{-2}}\)
= 200Hz
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