Question
Question: Three sound waves of equal amplitudes have frequencies (*v* – 1), *v*, (*v* + 1). They superpose to ...
Three sound waves of equal amplitudes have frequencies (v – 1), v, (v + 1). They superpose to give beats. The number of beats produced per second will be –
A
4
B
3
C
2
D
1
Answer
2
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