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

The metal which do not break beyond elastic limit is

On applying external force beyond the elastic limit,

On applying external force beyond the elastic limit,

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

Draw stress-strain curve for aa loaded steel wire and hence define te terms permanent set, elastic limit, yield point and tensile strength.