What is minimum length of a tube, open at both ends, that resonates with tuning fork of frequency 350 Hz ? [velocity of sound in air = 350 m/s] 

(1) 50 cm

(2) 100 cm

(3) 75 cm

(4) 25 cm

(1) Fundamental frequency n=v2l

350=3502LL=12m=50cm.

Difficulty Level:

  • 58%
  • 25%
  • 12%
  • 7%