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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`

1 Answer

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Best answer
Correct Answer - A
`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.

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