Thermal Stress in a Rod

2024 1 question

1. 1 Mechanical Properties of Solids Hard
   A metallic bar of Young's modulus, $0.5\times10^{11}$ N m$^{-2}$ and coefficient of linear thermal expansion $10^{-5}\ ^\circ C^{-1}$, length 1 m and area of cross-section $10^{-3}$ m$^2$ is heated from $0^\circ C$ to $100^\circ C$ without expansion or bending. The compressive force developed in it is:
   A $100\times10^3$ N B $2\times10^3$ N C $5\times10^3$ N D $50\times10^3$ N
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