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A pipe of length 85 cm is closed from o...

A pipe of length 85 cm is closed from one end.Find the number of possible natural oscillations of air columm in the pipe whose frequencies lie bnelow 1250 Hz.The velocity of sound in air is 340 `m//s`.

A

6

B

4

C

12

D

8

Text Solution

Verified by Experts

The correct Answer is:
A
Fundamental frequency of closed organ pipe
`f_(0)=(v)/(4l)=(340)/(4xx0.85)=100Hz`
So possible frequencies below 1250 Hz are
`100 Hz,300 Hz,500 Hz,700 Hz,900 Hz,1100 Hz`
`rArr` No. of frequencies = 6.
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