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Q.

The fundamental frequency of a string stretched with a weight of 4 kg is 256 Hz. The weight required to produce its octave is

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a

4 kg wt

b

8 kg wt

c

12 kg wt

d

16 kg wt

answer is D.

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Detailed Solution

n=12lTm⇒n∝T  For octave, n'=2n⇒n'n=T'T=2⇒T'=4T=16kg-wt
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