If a metal wire is stretched a little beyond its elastic limit (or yield point), and released, it will

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lose its elastic property completely

not contract

contract, but its final length will be greater than its initial length

contract only up to its length at the elastic limit

answer is C.

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Detailed Solution

OA→Proportional limit
OB→Elastic limit
B→Upper yield stress
C→Lower yield stress
D→Ultimate strength
E→Fracture

Point B displays the yield point. Up until this point B, the material is elastic.
When the material is released after being strained up to point B, it will take on its former shape.
If material is strained past point B, it will become permanently deformed; conversely, if material is released after being strained up to point B, it will have an elongation symbolised by OQ.
The material will shrink, but it won't take on its previous shape; instead, its length will increase.

Hence the correct answer is contract, but its final length will be greater than its initial length .

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