JEE Main 20179 Apr, Morning shiftPhysicsMediumProperties of Solids and Liquids184× since 2002
A steel rail of length 5 m and area of cross section 40cm²
is prevented from expanding along its length while the temperature rises
by 10^oC. If coefficient of linear expansion and Young’s modulus of steel are 1.2×10−5 K−1 and 2×10¹¹ Nm−2 respectively, the force developed in the rail is approximately :