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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Answer:
Correct Answer: 11. (a)
Solution:
- In one second number of maximas is called the beat frequency. Hence,
$$ f _b=f _1-f _2=\frac{100 \pi}{2 \pi}-\frac{92 \pi}{2 \pi}=4 Hz $$
