Air confined to a tube closed at both ends with movable piston at one of the ends is used to produce standing sound waves inside. If V is speed of sound in air inside and L is length of the tube then condition for resonant frequencies v n is:
A
v n = 
, n =1,2,3......
, n =1,2,3......
B
v n = 
,n = 1,3,5............
,n = 1,3,5............
C
v n = 
, n = 1,5,9...........
, n = 1,5,9...........
D
A tube closed at both ends does not have any resonant frequencies
Text Solution
Verified by ExpertsThe correct answer is:
A
n 
= L where n = 1,2,3............
using V = v λ λ
v = 
, n = 1,2,3...........
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