1.

If 'α' is coefficient of thermal expansion, 'ΔT' is magnitude of change in temperature and 'E' is modulus of elasticity, then the expression for thermal stress induced in a rod of length 'l' that is fixed between two rigid ends is given as-

A. αElΔT
B. αEΔT
C. αΔT/El
D. αlΔT
Answer» C. αΔT/El


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