A tuning fork of frequency 340Hz is vibrated just above the tube of 12 – McqOptions

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1.	A tuning fork of frequency 340Hz is vibrated just above the tube of 120 cm height. Water is poured slowly in the tube. What is the minimum height of water necessary for the resonance (speed of sound in the air = 340 m/sec) [CBSE PMT 1999; UPSEAT 1999]
A.	15 cm
B.	25 cm
C.	30 cm
D.	45 cm
Answer» E.

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