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

A metal rod of Young's modulus Y and coefficient of thermal expansion

1.	A metal rod of Young's modulus Y and coefficient of thermal expansion a is held at its two ends such that its length remains invariant. If its temperature is raised by t^(@)C, the linear stress developed in it is:
Answer» `(Y)/(alpha t)` `Y alpha t` `(1)/((Y alpha t)` `(alpha t)/(Y)` Solution :`Y =(F//A)/(DELTA lIl)` So, F=A `Y alpha t` Thermal stress (F/A) `=Y alpha t`. CORRECT choice : (B).

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

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