Two tuning forks A and B vibrating simultaneously produce 5 beats. Frequency of B is 512. It is seen that if one arm of A is filed, then the number of beats increases. Frequency of A will be
Text Solution
Verified by ExpertsThe correct answer is:
C
After filling frequency increases, so 
decreases ( ↓ ↓ ).
Also it is given that beat frequency increases (i.e., x )
Hence n A ↓ ↓ – n B = x ... (i) Correct
n B – n A = x ... (ii) Wrong
⇒ ⇒ n A = n B + x = 512 + 5 = 517 Hz.
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