NEET Physics Waves Questions Solved

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Two closed organ pipes of length 100 cm and 101 cm 16 beats in 20 sec. When each pipe is sounded in its fundamental mode calculate the velocity of sound 

(1) 303 ms–1

(2) 332 ms–1

(3) 323.2 ms–1

(4) 300 ms–1

(3) Number of beats per second,

n=1620=45n=n1n2=v41l11l2

45=v41111.01=0.01v4×1.01

v=16×1015=323.2ms1

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