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Questions  

Beats are produced by two waves 
    y1=a sin 1000 πt,  y2=a sin 998 πt
The number of beats heard/sec is 

a
0
b
2
c
1
d
4

detailed solution

Correct option is C

n1=1000π2π=500Hz  and  n2=998π2π=499HzHence beat frequency = n1−n2=1

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Similar Questions

A metal wire of diameter 1.5 mm is held on two knife edges separated by a distance 50 cm the tension in the wire is 100 N the wire vibrating with its fundamental frequency and vibrating tuning fork together produces 5 beats per second. The tension in the wire is then reduced to 81 N, when the two are excited, beats are heard at the same rate. Calculate frequency of the fork.


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