A fork of unknown frequency gives four beats $s^{- 1}$ when sounded with another of frequency 256. The fork is now loaded with a piece of wax and again four beats $s^{- 1}$ are heard. Then the frequency of the unknown fork is

Question

Dr. Abubacker · Accepted Answer

(d) Frequency of unknown fork $= 256 \pm 4 = 260\ or\ 252$.
As frequency decreases on loading, therefore, original frequency of unknown fork $= 260\ Hz$.

Q. A fork of unknown frequency gives four beats $s^{- 1}$ when sounded with another of frequency 256. The fork is now loaded with a piece of wax and again four beats $s^{- 1}$ are heard. Then the frequency of the unknown fork is

Explanation

Reviewed by Dr. Abubacker

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