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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 Nm 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
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B
2 and 3
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C
1 and 3
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D
1 and 2
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Solution

The correct option is A 1, 2 and 3
Modulus of rigidity indicates shear elasticity, and is defined for solids only.
SI unit is Nm1 or pascal like all other Modulus.

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