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In a resonance tube, the first resonance...

In a resonance tube, the first resonance is obtained at 40 cm length, using a tuning fork of frequency 450 Hz. Ignoring end correction, the velocity of sound in air is

A

620 m/s

B

720 m/s

C

820 m/s

D

1020 m/s

Text Solution

Verified by Experts

The correct Answer is:
B
`(lambda)/(4) = 40` cm = 0.4 `implies therefore lambda = 4 xx 0.4 = 1.6 m , f = 450` Hz
Velocity of sound `v = f lambda = 450 xx 1.6 = 720` m/s
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