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A wire is stretched through 2mm by a cer...

A wire is stretched through 2mm by a certain load. What will be the extension produced in a wire of the same material with double the length and radius with the same load ?

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l =( M g L)/(pi r^2 y) or l alpha 1/r^2` `l_2/l_1 = L_2/L_1 xx (r_1/r_2)^2 = 2/1 xx 1/4 = 1/2`
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