A stretched sonometer wire is in unison with a tuning fork. When length of wire is increase by 1%, the number of beats heard per second is 5. then, th

Question

A stretched sonometer wire is in unison with a tuning fork. When length of wire is increase by 1%, the number of beats heard per second is 5. then, th

A stretched sonometer wire is in unison with a tuning fork. When length of wire is increase by 1%, the number of beats heard per second is 5. then, the frequency of the fork is
A. 500 Hz
B. 505 Hz
C. 255 Hz
D. 250 Hz

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`l_2 = (1.01)l_1`
`n_1-n_2 = 5 therefore nl_1 = n_2l_2`
`therefore n_1/n_2 = l_2/l_1 = 1.01`
`therefore n_1=1.01n_2`
`therefore 1.01n_2-n_2 = 5 therefore n_2xx0.01=5`
`n_2=500`
`therefore n_1=n_2+5=505Hz`

5 views Answered 2023-02-05 15:29