2019 · Q85
The Hooke's law is valid for
General KnowledgePhysics
- AOnly proportional region of the stress-strain curve curve
- BEntire stress-strain curve
- CEntire elastic region of the stress strain curve
- DElastic as well as plastic region of the stress-strain curve curve
Explanation
Hooke's law states that stress is proportional to strain, but this linear relation holds only within the proportional limit of the stress-strain curve. Beyond the elastic limit the material deforms plastically and the law fails. It is not valid over the entire curve or the plastic region. Hence option A is correct.