JEE Main & Advanced
Physics
Wave Mechanics
JEE PYQ-Wave Mechanics
question_answer
A uniform tube of length 60.5 cm is held vertically with its lower end dipped in water. A sound source of frequency 500 Hz sends sound waves into the tube. When the length of tube above water is 16 cm and again when it is 50 cm, the tube resonates with the source of sound. Two lowest frequencies (in Hz), to which tube will resonate when it is taken out of water, are (approximately). [JEE ONLINE 19-05-2012]
A) 281, 562
B) 281, 843
C) 276, 552
D) 272, 544
Correct Answer:
D
Solution :
[d] Two lowest frequencies to which tube will resonates are 272 Hz and 544 Hz.