Wave Motion 5 Question 11

11. How many times does an observer hear maximum intensity in one second?

(2006, 5M)

(a) 4

(b) 10

(c) 6

(d) 8

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Solution:

  1. In one second number of maximas is called the beat frequency. Hence,

fb=f1f2=100π2π92π2π=4Hz



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