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  • The number of possible natural oscillations of the air column at one end of length 80cm whose frequencies lie below 1200 Hz are:  Option: 1</stron

The number of possible natural oscillations of the air column at one end of length 80cm whose frequencies lie below 1200 Hz are:

 

Option: 1

4


Option: 2

5


Option: 3

7


Option: 4

6


Answers (1)

best_answer

Fundamental frequency, 

n_{0} = \frac{v}{4l} = \frac{34000}{4 * 80} \approx 100

Thus, present natural frequencies are odd multiples of the fundamental frequency, that is, 100, 300, 500, 700, 900, 1100.

So, the number of natural oscillations = 6

Posted by

shivangi.shekhar

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