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In resonance tube experiment, first reso...

In resonance tube experiment, first resonance occurs for the length of air - column equal to 25 cm with a tuning fork of frequency 340 Hz. If the length of the air column is decreased by 1cm , the frequency of beats will be

A

28Hz

B

7Hz

C

14Hz

D

9Hz

Text Solution

Verified by Experts

The correct Answer is:
C
`n_2/n_1 = l_1/l_2 = 25/24`
`(n_2-n_1)/(n_1) = (25-24)/(24)`
`n_2-n_1 = 340/24 = 14`
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