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A steel wire of cross sectional area 2 m...

A steel wire of cross sectional area 2 `mm^(2)` is just stretched horizontally between two fixed points at a temperature of `35^(0)C`. The temperature of the wire changed to `25^(0)C`. Then
(Cofefficient of linear expansion pof steel `=11 xx 10^(-6)//""^(0)C : Y_("steel") = 2xx10^(11)Nm^(-2)`)

A

the thermal strain is `11xx10^(-5)`

B

the thermal stress is `2.2xx10^(7)N//m^(2)`

C

the tension in the wire at temperature `25^(0)C` is 44N

D

all the above

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