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A metal rod of Young's modules Y and coe...

A metal rod of Young's modules Y and coefficient of thermal expansion `alpha` is held at its two ends such that its length remains constant. If its temperature is raised by `t^(@)C`, the linear stress developed in it is

A

`Yalphat`

B

`(1)/(Yalphat)`

C

`(alphat)/(Y)`

D

`(Y)/(alphat)`

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The correct Answer is:
A
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