If S is the stress and Y is young's modulus of the material of a wire , then the energy stored in the wire per unit volume is

If S is the stress and Y is young's modulus of the material of a wire

1.	If S is the stress and Y is young's modulus of the material of a wire , then the energy stored in the wire per unit volume is
Answer» `1/2S^2/Y` `2Y/S^2` `S/2Y` `2S^2Y` ANSWER :A