A metallic bar of Young’s modulus, 0.5 10 11 N m -2 and coefficient of linear thermal expansion 10 -5 C -1 , length 1 m and area of cross-section 10 -3 m 2 is heated from 0 C to 100 C without expansion or bending. The compressive force developed in it is :

1. A. 5 10 3 N
2. B. 50 10 3 N
3. C. 100 10 3 N
4. D. 2 10 3 N

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