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InterviewSolution
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A is singing a note and at the same time B is singing a note with exactly one eighth the frequency of the note of A. The energies of two sounds are equal, the amplitude of the note of B isA. same that of AB. twice as that of AC. four times as that of AD. eight times as that of A |
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Answer» Correct Answer - D It is given that energy remains the same Hence `E_A=E_B` energy `propa^2n^2implies(a_B)/(a_A)=(n_A)/(n_B)" "( ":.energy same ")` `:. ((a_A)/(a_B))^2=((n_B)/(n_A))^2` Given, `n_A=n,n_B=(n)/(8)` `:. (a_A)/(a_B)=(n//8)/(n)=(1) rArr a_(B)=8a_(A)=8a`. |
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