Question

Two tuning forks `A` and `B` vibrating simultaneously produce `5 beats//s`. Frequency of `B` is `512 Hz`. If one arm of `A` is filed, the number of beats per second increases. Frequency of `A` is
A. `502 Hz`
B. `507 Hz`
C. `517 Hz`
D. `522 Hz`

Answer 1

Correct Answer - C
`f_(B) = 512 Hz, f_(A) = 512+-5=517` or `507 Hz`
If arms of `A` is filed, `f_(A): uparrow` Beat frequency: `uparrow`.
`f_(A) = 517 Hz`