Question

Match List-I with List-II :

List-I	List-II
(A) A force that restores an elastic body of unit area to its original state	(I) Bulk modulus
(B) Two equal and opposite forces parallel to opposite faces	(IV) Shear modulus
(C) Forces perpendicular everywhere to the surface per unit area same everywhere	(III) Stress
(D) Two equal and opposite forces perpendicular to opposite faces	(II) Young's modulus

Choose the correct answer from the options given below :

• A. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
• B. (A)-(IV), (B)-(II), (C)-(III), (D)-(I)
• C. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• D. (A)-(III), (B)-(I), (C)-(II), (D)-(IV)

Answer 1

The Correct Option is C

The correct pairings between List-I and List-II are:

- (A) A force per unit area that restores an elastic body to its original state matches Stress (III). Stress is force divided by area, acting to revert deformation.
- (B) Equal and opposite forces parallel to opposite faces correspond to Shear modulus (IV). Shear modulus quantifies a material's reaction to shear stress, involving parallel surface forces.
- (C) Forces applied perpendicularly to a surface per unit area correspond to Bulk modulus (I). Bulk modulus describes a material's response to uniform pressure and its uniform compressibility.
- (D) Equal and opposite forces perpendicular to opposite faces correspond to Young’s modulus (II). Young’s modulus relates to stretching or compression perpendicular to applied forces.

The correct matching is:

\[ \text{(A)-(III), (B)-(IV), (C)-(I), (D)-(II)}. \]