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A metal rod is rigidly fixed at its both ends. The temperature of the rod is increased by 100°C. If the coefficient of linear expansion and elastic modulus of the metal rod are $10\times 10^{-6}mm/_{}^{0}\textrm{C}$ and 200 GPa respectively, then what is the stress produced in the rod?

(a) 100 MPa (tensile)                 

(b) 200 MPa (tensile)

(c) 200 MPa (compressive)

(d) 100 MPa (compressive)

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