In a resonance tube experiment, a closed organ pipe of leng…

Physics Wave and Sound General MCQ (Single Correct)

In a resonance tube experiment, a closed organ pipe of length 120 cm is used. Initially it is completely filled with water. It is vibrated with tuning fork of frequency 340 Hz. To achieve resonance the water level is lowered then (given v air = 340 m/sec., neglect end correction):

minimum length of water column to have the resonance is 45 cm.

the distance between two successive nodes is 50 cm.

the maximum length of water column to create the resonance is 95 cm.

the distance between two successive nodes is 25 cm.

Text Solution

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The correct answer is:

CHECK THE SOLUTION

(a, b, c)

x =

λ = = 1 m

x = m = 25 cm

For other resonance position

x = (2n – 1)

so x = 25, 75, 125 cm.....................

Tube length is only 120 cm so get resonance minimum length of water = 120 – 75 = 45

maximum length = 120 – 25 = 95

Distance between two successes nodes = = 50

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