Question

High elastic modulus in materials arises from

• A. High strength of bonds
• B. Weak bonds
• C. Combination of bonds
• D. None of these

Answer 1

Answer:

A. High strength of bonds

Elastic modulus in materials depends on the inter-atomic bonding force, which results in resistance to elastic deformation. This force arises from stretching of interatomic bonds and changes in separation between two adjacent atoms. The slope of the stress-strain curve determines the modulus of elasticity, which is directly proportional to the strength of the bonds. Therefore, high elastic modulus in materials arises from high strength of bonds.