The following four wires of length L and...

The following four wires of length L and radius r are made of the same material. Which of these will have the largest extension, when the same tension is applied?

A

L=400 cm, r=0.8mm

B

L=300 cm, r=0.6mm

C

L=200 cm, r=0.4mm

D

L=100 cm, r=0.2mm

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