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For an iron track temperature is increas...

For an iron track temperature is increased by `10^(@)C` Given `/alpha = 10^-5 /C` , `Y = 10^11 N/m^2` area of crosssection A = `10^-2 m^2`. Find energy stored per unit length

A

`5 J/m`

B

`10 J/m`

C

`15 J/m`

D

`20 J/m`

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