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  • A steel rod of length and cross sectional area <img alt="10^{-4} \mathrm{~m}^{2}" src="http

A steel rod of length 1 \mathrm{~m} and cross sectional area 10^{-4} \mathrm{~m}^{2} is heated from 0^{\circ} \mathrm{C}$ to $200^{\circ} \mathrm{C} without being allowed to extend or bend. The compressive tension produced in the rod is______\times 10^{4} \mathrm{~N}. (Given Young's modulus of steel =2 \times 10^{11} \mathrm{Nm}^{-2},coefficient of linear expansion =10^{-5} \mathrm{~K}^{-1}) 

Option: 1

4


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

Thermal stress =\mathrm{Y} \alpha \Delta \mathrm{T}

\text { F }=\mathrm{YA} \alpha \mathrm{A}

=2 \times 10^{11} \times 10^{-4} \times 10^{-5} \times 200

=4 \times 10^{4}

\mathrm{x}=4

Posted by

manish

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