Correct Answer - Option 4 : Strain
Strain: Strain is a measure of the deformation of the material as a result of the force applied.
- The strain is a unitless quantity.
Stress: Stress is the ratio of the load or force to the cross-sectional area of the material to which the load is applied.
- The standard unit of stress is N/m2.
Hooke's law states that within the elastic limit the stress applied on a body is directly proportional to the strain produced.
⇒ Strain ∝ Stress
⇒ Strain = E × Stress (Where E = modulus of elasticity)