When a weight of \(10 \mathrm{~kg}\) is suspended from a copper wire of length \(3 \mathrm{~m}\) and…
When a weight of \(10 \mathrm{~kg}\) is suspended from a copper wire of length \(3 \mathrm{~m}\) and diameter \(0.4 \mathrm{~mm}\), its length increases by \(2.4 \mathrm{~cm}\). If the diameter of the wire is doubled, then the extension in its length will be