Assertion: to elastic limit of a stress-strain curve the...

Assertion:
to elastic limit of a stress-strain curve the steel wire tends to regain its original shape when stress is removed.Reason: Within elastic limit the wire follows Hook's law.
(A) A
(B) $\mathrm{B}$
(C) $\mathrm{C}$
(D) D

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Key Concepts

Elastic Limit

The elastic limit is the maximum stress or force per unit area that a material can withstand without undergoing permanent deformation. Within this limit, any deformation caused by the applied load is completely reversible when the load is removed.

Hooke's Law

Hooke's law states that the deformation or displacement of a material is directly proportional to the applied force as long as the material's elastic limit is not breached. This principle forms the basis for understanding linear elastic behavior in materials.

Stress-Strain Curve

A stress-strain curve visually represents the relationship between the applied stress on a material and the resulting strain (deformation) it experiences. The curve helps in identifying the elastic region—where the material will return to its original shape—followed by the plastic region where permanent deformation occurs.

Elastic and Plastic Deformation

Elastic deformation occurs when a material is deformed under stress and returns to its original shape upon removal of the load, whereas plastic deformation refers to permanent changes in shape that occur when the stress exceeds the elastic limit. The distinction between these two behaviors is crucial for understanding material properties and performance.

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