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If S is stress and Y is Young's modulus ...

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

A

`(SY)/2`

B

`(S^(2))/(2Y)`

C

`S/(2y)`

D

`(2S)/Y`

Text Solution

Verified by Experts

The correct Answer is:
B
Energy per unit volume `=1/2xx"Stress"xx"Strain"`
`=1/2xx"Stress"xx"Stress"/Y|Y="Stress"/"Strain"=(S^(2))/(2Y)`
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