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A wire of initial length L and area of c...

A wire of initial length L and area of cross section A has Young's modulus Y of its material. The wire is stretched by a stress 5 within its elastic limit. The stored energy density in the wire will be

A

`5/(2Y)`

B

`(2Y)/5^2`

C

`5^2/(2Y)`

D

`5^2/Y`

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The correct Answer is:
C
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