Question

Consider the following statements.
1. Modulus of rigidity or shear modulus of elasticity (G) is defined as the ratio of tangential stress to the shearing strain within the elastic limit.
2. The SI unit of modulus of rigidity is $N{m}^{-}$ or pascal.
3. Modulus of rigidity is involved with solids only.
Which of the statement(s) given above is/are correct?

• A. 1, 2 and 3
• B. 2 and 3
• C. 1 and 3
• D. 1 and 2

Answer 1

The correct option is A 1, 2 and 3

Modulus of rigidity indicates shear elasticity, and is defined for solids only.

SI unit is $N{m}^{-1}orpascal$ like all other Modulus.