JEE Main 2020PhysicsMechanical Properties of SolidsEasyMCQ

JEE Main 2020Mechanical Properties of Solids Question with Solution

JEE Main 2020 (09 Jan Shift 2)

Question

Two steel wires having same length are suspended from a ceiling under the same load. If the ratio of their energy stored per unit volume is 1:4, the ratio of their diameters is:

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Show full solutionCorrect option: A
Correct answer
A2:1

Step-by-step explanation

dudv=12 stress ×stressy
=12F2A2y
dudvα1d4
dudv1dudv2=d24d14=14
d1d2=41/4
d1d2=2:1

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About this question

This is a previous-year question from JEE Main 2020, covering the Mechanical Properties of Solids 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.