question_answer

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