A is singing a note and simultaneously B is singing another note whose frequency is 1/8th that of A. The energy of two notes is the same. The amplitude of B note as compared to that of A note is
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a
equal
b
two times
c
four times
d
eight times
answer is D.
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Detailed Solution
I=2π2n2a2ρv= constant or aBaA=nAnB=8nAnA=8 or aB=8aA