A wire of length L and cross-sectional a...

A wire of length L and cross-sectional area A is made of material of Young's modulus Y. The work done in stretching the wire by an amount x is

A

`(Yax^2)/(L)`

B

`(Yax^2)/(2L)`

C

`(2Yax^2)/(L)`

D

`(4Yax^2)/(L)`

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