InterviewSolution
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InterviewSolution
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In order to double the frequency of the fundamental note emitted by a stretched string, the length is reduced to `(3)/(4)`th of the original length and the tension is changed. The factor by which the tenstion is to be changed isA. `3//8`B. `2//3`C. `8//9`D. `9//4` |
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Answer» Correct Answer - D `n=(1)/(2l)sqrt((T)/(m))impliesnprop(sqrtT)/(l)` `implies(T_2)/(T_1)=((n_2)/(n_1))^2((l_2)/(l_1))^2=(2)^2((3)/(4))^2=(9)/(4)` |
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