A steel rod is heated from 25 to 250 degree celcius. Its coefficient o – McqOptions

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1.	A steel rod is heated from 25 to 250 degree celcius. Its coefficient of thermal expansion is 10-5 and E = 100 GN/m2. if the rod is free to expand, the thermal stress developed in it is:
A.	100 kN/m2
B.	240 kN/m2
C.	Zero
D.	Infinity
Answer» D.

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