Waves

JEE Main level, single correct, medium

121 of 142

Question 121 of 142

The correct figure that shows, schematically, the wave pattern produced by the superposition of two waves of frequencies 9Hz9Hz and11Hz11Hz, is

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Answer: (A)

Beat frequency =11−9=2Hz=11-9=2 Hz
No.of maxima per second is 2.
Time period of beat =12s.=\dfrac{1}{2} s.

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