JEE Mains · Physics · STD 11 - 14. waves and sound
Two tuning forks A and B are sounded together giving rise to 8 beats in 2 s. When fork A is loaded with wax, the beat frequency is reduced to 4 beats in 2 s. If the original frequency of tuning fork B is 380 Hz, then the original frequency of tuning fork A is ___________ Hz.
- A 384
- B 376
- C 388
- D 372
Answer & Solution
Correct Answer
(A) 384
Step-by-step Solution
Detailed explanation
\(|f_{A}-f_{B}|=4\) \(|f_{A}-380|=4\) So, \(f_{A}=384~Hz\) or 376 Hz on loading with wax \(f_{A}\) decreases So, \(f_{A}=384~Hz\)
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