Question

Explain modulus of rigidity and bulk modulus of elasticity for a solid .

Answer 1

There's a straightforward relationship between the modulus of rigidity—which I'll refer to as shear modulus G, as it's also known as—and the modulus of elasticity E. That can be derived by combining the generalized Hooke's law with a state of pure shear stress as occurs for, say, a torsion test.