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​The stress developed in a bar which is not free to expand due to increase in temperature, is given as: where α is the coefficient of ther
Question

The stress developed in a bar which is not free to expand due to increase in temperature, is given as:
where α is the coefficient of thermal expansion and ΔT temperature increased.

A.

B.

C.

D.

Correct option is A

So P = Eαt

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