A uniform wire of length L and radius r ...

A uniform wire of length L and radius r is twiste by an angle `aplha`. If modulus of rigidity of the wire is, then the elastic potential energy stored in wire

`(pietar^4aplha)/(2L^2)`

`(pietar^4aplha^2)/(4L)`

`(pietar^4aplha)/(4L^2)`

`(pietar^4aplha^2)/(2L)`

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