Question:
A tuning fork A of unknown frequency produces 5 beats/s with a fork of known frequency $340 \mathrm{HZ}$. When fork A filed, the beat frequency decreases to 2 beats/s. What is the frequency of fork A?
Correct Option: , 2
Solution:
(2)
Given
Before Filed :
So answer should be $335 \mathrm{~Hz}$ or $345 \mathrm{~Hz}$.
After Filed :
After filed beat/sec decreases only in case of $335 \mathrm{~Hz}$.
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