Waves & Sound · JEE Main previous year questions

2009 1 question

1. Q432009 · 27 Apr 2009 · Shift 1

   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 :

   1. A.3
   2. B.2
   3. C.1
   4. D.4
   Show answer

   Answer: B