A bar of mass m and length l is hanging ...

A bar of mass m and length l is hanging from point A as shown in the figure . If the Young's modulus of elasticity of the bar is Y and area of cross - section of the wire is A, then the increase in its length due to its own weight will be

`(mgL)/(2AY)`

`(mgA)/(2LY)`

`(mg)/(2LAY)`

`(2LY)/(mgA)`

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