Question

High elastic modulus in materials arises due to

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

Answer 1

The correct option is A

High strength of bonds

The explanation for the correct Answers:

Option (A) High strength of bonds

• In identical products, the modulus of elasticity is proportional to the greater the rigidity.
• The greater the rigidity of a structure, the more force is needed for deformation.
• The elastic modulus is,$\mathrm{\delta }=\frac{\mathrm{Stress}}{\mathrm{Strain}}$
• Where stress is the force causing the deformation divided by the area to which the force is applied and strain is the ratio of the change in some parameter caused by the deformation to the original
• Young's modulus depends on interatomic bonds as well as the ways in which atoms are packed.
• Young's modulus represents the strength of the bonds between all the atoms in a crystal.
• So, High elastic modulus in materials arises due to the high strength of bonds.
• Hence, the correct answer is (A) High strength of bonds.

The explanation for incorrect answers:

Option (B) Weak bonds

• Young's modulus depends on interatomic bonds and it represents the strength of the bonds between all the atoms in a crystal.
• So, if the bonds are weak then the material will have a low elastic modulus.
• Hence option (B) weak bonds is incorrect.

Option (c) Combination of bonds

• Young's modulus depends on interatomic bonds and it represents the strength of the bonds between all the atoms in a crystal.
• High elastic modulus in materials arises due to the high strength of bonds.
• Hence option (c) Combination of bonds is incorrect.

Option (D) None

• Option (A) High strength of bonds is correct.
• Hence Option (D) None is incorrect.

Therefore, option (A) High strength of bonds is the correct answer.