Question
Question: A tuning fork A produces 4 beats/second with another tuning fork B of frequency 288 Hz. When the for...
A tuning fork A produces 4 beats/second with another tuning fork B of frequency 288 Hz. When the fork A is loaded with a little wax. The beat frequency changes to 2. The frequency of the fork A before loading is (in Hz)-
A
290
B
288
C
292
D
284
Answer
292
Explanation
Solution
288 – nA = 4 , nA = 284 Hz
or nA – 288 = 4 , nA = 292 Hz
On loading wax nA decreases so 284 Hz Can't be the answer