The number of possible natural oscillations of column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are : (velocity of sound = 340 ms1)
4
5
7
6
As discussed in
i.e., Possible natural oscillation is 6.
Option 1)
4
This option is incorrect.
Option 2)
5
This option is incorrect.
Option 3)
7
This option is incorrect.
Option 4)
6
This option is correct.