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

A wire of length L and cross sectional area A is made of a material of Young's modulus Y. If the wire is streched by an amount x, the work done is………………

`(YA)/(2L)`

`(YAx)/(2L)`

`(YAx^(2))/(L)`

`(YAx^(2))/(2L)`

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