Two movable knife edges are use to divide the wire into three segments, such that the fundamental frequencies of the three segments are in the ratio 1 : 2:3, find the length of three segments.
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In an electrical cable there is a single wire of radius `9 mm` of copper. Its resistance is `5 Omega`. The cable is replaced by 6 different insulated copper, wires the radius of each wire is `3 mm`. Now the total resistance of the cable will be
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