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The number of possible natural oscillart...

The number of possible natural oscillartions of air column in a pipe closed at one end of length 85 cm whose ferquences lie below 1250 Hz are (velocity of sound = 340 ms^(-1))`

A

4

B

5

C

7

D

6

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The correct Answer is:
D
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The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are (velocity of sound =340ms^(-1) ).

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