# Types of Modulus

3. #### Rigidity Modulus or Shear Modulus (C)

1. Young’s Modulus or Modulus of Elasticity : Young’s Modulus  is defined as ratio of Normal Stress to Longitudinal Strain. Young’s Modulus is usually denoted with letter E.

2. Bulk Modulus : Bulk Modulus is defined as, when a body is subject to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as Bulk Modulus. Bulk Modulus is usually denoted with letter K.

3. Rigidity Modulus or Shear Modulus : Rigidity Modulus is defined as ratio of Shear stress to Shear Strain. Rigidity Modulus is usually denoted with letter C.