question_answer

An elastic material of Young's modulus Y is subjected to a stress S. The elastic energy stored per unit volume of the material is                                [MP PET 1991; MP PMT 1990, 96; IIT 1992; AIIMS 1997]

A)             \[\frac{2Y}{{{S}^{2}}}\]   

B)             \[\frac{{{S}^{2}}}{2Y}\]

C)             \[\frac{S}{2Y}\]         

D)             \[\frac{{{S}^{2}}}{Y}\]