Beats are produced by two waves given by y1=asin2000πt and y2=asin2008πt. The number of beats heard per second is 

(1) Zero

(2) One

(3) Four

(4) Eight

(3) Number of beats per second = n1 ~ n2

ω1=2000π=2πn1n1 = 1000

and ω2=2008π=2πn2n2 = 1004

Number of beats heard per sec = 1004 – 1000 = 4

Difficulty Level:

  • 11%
  • 9%
  • 71%
  • 11%