Initially beat frequency =5Hz
so, ρA=340±5=345Hz, or 335Hz
after filing frequency increases slightly so, new value of frequency of A>ρA
Now, beat frequency =2Hz
⇒ new ρA=340±2=342Hz, or 338Hz
hence, original frequency of A is ρA=335Hz
A tuning fork A of unknown frequency produces 5beatss−1 with a fork of known frequency 340Hz. When fork A is filed, the beat frequency decreases to 2beatss−1. What is the frequency of fork A ?
Held on 26 Feb 2021 · Verified 6 Jul 2026.
335Hz
338Hz
345Hz
342Hz
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