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A set 65 tuning forks is arranged so tha...

A set 65 tuning forks is arranged so that each gives 3 beats per second with the previous one and the frequency of last fork is an octave of first. Then the frequencies of first and last tuning forks are

A

192 Hz, 384 Hz

B

64 Hz, 26 Hz

C

384 Hz, 576 Hz

D

64 Hz, 64 Hz

Text Solution

Verified by Experts

The correct Answer is:
A
`N = (n_(L) - n_(f))/(x) + 1`
`65 -1 = (2n - nf)/(3)`
`64 xx 3 = n_(f)`
`192 = n_(f)`
`n_(L) = 2n_(f) = 2 xx 192 = 384 Hz`
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