JEE Main 2017PhysicsThermal Properties of MatterEasyMCQ

JEE Main 2017 — Thermal Properties of Matter Question with Solution

JEE Main 2017 (09 Apr Online)

Question

A steel rail of length 5 m and area of cross section 40 cm2 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 1.2×10-5  K-1 and 2×1011 N m-2 respectively, the force developed in the rail is approximately:

Choose an option

Show full solutionCorrect option: D
Correct answer
D1×105 N

Step-by-step explanation

F=YAαΔt

⇒F=2×1011×40×10-4×1.2×10-5×10

⇒F=9.6×104≈1×105 N.

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About this question

This is a previous-year question from JEE Main 2017, covering the Thermal Properties of Matter chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.