JEE PYQ: Waves And Sound Question 31
Question 31 - 2019 (10 Apr Shift 2)
The correct figure that shows, schematically, the wave pattern produced by superposition of two waves of frequencies 9 Hz and 11 Hz is :
(1) Beat pattern with 2 beats per second, envelope with period 1s
(2) Beats with smooth envelope
(3) Multiple beats pattern
(4) Rapid beats pattern
Show Answer
Answer: (3)
Solution
Beat frequency $=$ difference in frequencies of two waves $= 11 - 9 = 2$ Hz
BETA
