JEE Main 9 April 2017 Paper Solved Paper

Section: Physics

Question : 8 of 90

Marks: +1, -0

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 ° C. If coefficient of linear expansion and Young’s modulus of steel are 1.2×10−5k−1 and 2×1011Nm−2respectively, the force developed in the rail is approximately :

[Main 9 April 2017]

2×107 N
1×105 N
2×109 N
3×10−5 N

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