JEE Main 2014PhysicsThermal Properties of MatterMediumMCQ

JEE Main 2014 — Thermal Properties of Matter Question with Solution

JEE Main 2014 (06 Apr)

Question

The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature is raised by 100 °C is :
(For steel, Young's modulus is 2×1011 N m-2 and coefficient of thermal expansion is 1.1×10-5 K-1)

Choose an option

Show full solutionCorrect option: A
Correct answer
A2.2×108 Pa

Step-by-step explanation

Young's modulus, Y=FALΔL

∴FA=YΔLL=YαΔT

∴P=2×​ 1011×1.1×10-5×102

∴ P=2.2×108 Pa

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About this question

This is a previous-year question from JEE Main 2014, 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.