1.

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.             \[\frac{{{S}^{2}}}{Y}\]
Answer» C.             \[\frac{S}{2Y}\]         


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