A tunig fork whose frequency as given by mufacturer is `512 Hz` is being tested with an accurate oscillator it is found that the fork produces a beat of 2 Hz when oscillator reads 514 Hz but produces a beat of 6 Hz when oscillator reads 510 Hz. The actual frequency of fork is

Options

A. 518 Hz
B. 516 Hz
C. 512 Hz
D. 508 Hz

Answer

B

Explanation

The frequency of the fork may be `514 -+ 2 = 516 Hz or 512 Hz`
In the second case, the frequency of the fork may be 510 `-+ 6` i.e., 516 Hz and 504 Hz.
`:.` The frequency must be 516 Hz