A rod is fixed between two points at $20\,^oC$ . The coefficient of linear expansion of material of rod is $1.1 \times 10^{-5}/\,^oC$ and Young's modulus is $1.2 \times 10^{11}\,N/m^2$. Find the stress developed in the rod if temperature of rod becomes $10\,^oC$
$1.32 \times 10^7\,N/m^2$
$1.10 \times 10^{15}\,N/m^2$
$1.32 \times 10^{8}\,N/m^2$
$1.10 \times 10^{6}\,N/m^2$
If the volume of a block of metal changes by $0.12\%$ when it is heated through $20^o\,C$, the coefficient of linear expansion (in per $^oC^{-1}$) of the metal is :-
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