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In the fundamental mode , time taken by ...

In the fundamental mode , time taken by the wave to reach the closed end of the air filled pipe is 0.01 s . The fundamental frequency is

A

15 Hz

B

20 Hz

C

25 Hz

D

`2.5` Hz

Text Solution

Verified by Experts

The correct Answer is:
C
In a pipe closed at one end , in the fundamental mode of vibration of the air column, the distance between the open and closed ends is `lambda/4`.
` :. ` The time taken by the wave to travel a distance `lambda`
` = 4 xx 0.01 = 0.04` s. This is the period T.
` :. T = 4/100 s " " :. n = 1/T = 25 ` Hz
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