# The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?

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The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?
A. Length = 50 cm, diameter = 0.5 mm
B. Length 100 cm, diameter =1
C. Length = 200 cm, diameter = 2 mm
D. Length = 300 cm, diameter = 3 mm

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Y=(T//A)/(/_l//l)
/_l=(Txxl)/(AxxY)=T/Yxxl/A
Here T/Y is constant
Therefore /_lpropl//A. As result l//A is larges in the first case.