A wire of uniform cross-sectional area A and young's modulus Y is stretched within the elastic limits. If s is stress in the wire, the elastic energy density stored in the wire in terms of the given parameters is

Options

A. `S/(2Y)`
B. `(2Y)/S^(2)`
C. `S^(2)/(2Y)`
D. `S^(2)/(Y)`

Answer

C