Question

Hooke’s law states that _________

(a) stress is always proportional to strain

(b) stress is proportional to strain before ultimate tensile strength

(c) stress is proportional to strain under elastic limit

(d) stress and strain are never directly proportional

The question was asked in quiz.

I'm obligated to ask this question of Hooke’s Law in portion Mechanical Properties of Solids of Physics – Class 11

Answer 1

Right answer is (c) stress is proportional to strain under elastic limit

To explain: Hooke’s law states that when deformation is small, stress is proportional to strain for almost all materials. The region where this law is followed is said to be under elastic limit.