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Four tuning forks of frequencies 200,201...

Four tuning forks of frequencies 200,201,204 and 206 Hz are sounded together. The beat frequency will be

A

6

B

12

C

15

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Now divide 1 seconds into number of beats between two freqeuncies

`((1)/(1))
(((1)/(2))) ((2)/(2))`
`((((1)/(2)))) [(2)/(3)] ((3)/(3))`
`(1)/(4) (((2)/(4))) (3)/(4) ((4)/(4))`
`(1)/(5) (2)/(5)(3)/(5)(4)/(5) ((5)/(5))`
`(1)/(6) (((2)/(6))) (((3)/(6))) [(3)/(6)] (5)/(6) ((6)/(6))`
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