question_answer

A rod of material with \[E=200\times {{10}^{3}}\] MPa and \[\propto ={{10}^{-\,3}}\text{mm/mm }\!\!{}^\circ\!\!\text{ C}\] is fixed at both the ends. It is uniformly heated such that the increase in temperature is\[\text{30 }\!\!{}^\circ\!\!\text{ C}\]. The stress, developed in the rod is

A) \[6000\,\,\text{N/m}{{\text{m}}^{\text{2}}}\](Tensile)

B) \[6000\,\,\text{N/m}{{\text{m}}^{\text{2}}}\](Compressive)

C) \[2000\,\,\text{N/m}{{\text{m}}^{\text{2}}}\](Tensile)

D) \[2000\,\,\text{N/m}{{\text{m}}^{\text{2}}}\](Compressive)