Question

High elastic modulus in material arises from?

• A. High strength of bonds
• B. Combination of bonds
• C. Weak bonds
• D. No bond

Hint:

The elastic modulus is directly proportional to the strength of the atomic or molecular bonds within a material. Stronger bonds lead to a higher modulus, making the material stiffer.

Answer 1

The Correct Option is A

The elastic modulus (also known as the modulus of elasticity) of a material measures its resistance to deformation under applied stress. It is a measure of the material's stiffness. The higher the elastic modulus, the stiffer the material. The elastic modulus is significantly influenced by the strength of the atomic or molecular bonds within the material.
- A material with high strength of bonds exhibits a higher elastic modulus because stronger bonds resist deformation more effectively. These strong bonds prevent the atoms or molecules in the material from moving easily under stress, resulting in a higher resistance to deformation.
- Combination of bonds refers to the nature of bonding, but the strength of individual bonds is what directly influences the material's elasticity.
- Weak bonds result in a lower elastic modulus because the material can deform more easily under stress.
- No bond would imply no cohesive force holding the material together, leading to a lack of stiffness, which is not a feasible scenario for materials in most practical cases.
Thus, the high elastic modulus in a material arises from the high strength of bonds.