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Q: The modulus of elasticity of a material is:
  • A. having the same unit as that of strain
  • B. only defined in the linearly elastic region
  • C. not referred to as Young’s modulus
  • D. equal to the slope of the strain–stress curve
Correct Answer: Option B - The modulus of elasticity of a material is only defined in the linearly elastic region. • In the linear elastic region of the stress-strain curve, Hooke's law is valid.
B. The modulus of elasticity of a material is only defined in the linearly elastic region. • In the linear elastic region of the stress-strain curve, Hooke's law is valid.

Explanations:

The modulus of elasticity of a material is only defined in the linearly elastic region. • In the linear elastic region of the stress-strain curve, Hooke's law is valid.