At yield point of a test piece, the material__________________?
A. Obeys hooke’s law
B. Behaves in an elastic manner
C. Regains its original shape on removal of the load
D. Undergoes plastic deformation
The ratio of shear stress and shear strain of an elastic material, is________________?
A. Modulus of rigidity
B. Shear modulus
C. Modulus of elasticity
D. Both a. and b