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JEE-MAIN 2021
01-09-2021 S2
Question
A steel rod with $\mathrm{y}=2.0 \times 10^{11} \mathrm{Nm}^{-2}$ and $\alpha=10^{-5^{\circ}} \mathrm{C}^{-1}$ of length 4 m and area of cross-section 10 cm2 is heated from 0° C to 400°C without being allowed to extend. The tension produced in the rod is x × $10^5$ N where the value of x is .............
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