JEE Main 2023 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 6 April 2023, Shift 1, Physics Q58

Question 58 of 90 in this shift, Physics question 28 of 30, Section B.

A steel rod has a radius of 20 mm and a length of 2.0 m. A force of 62.8 kN stretches it along its length. Young's modulus of steel is

2.0\times10^{11}\ \mathrm{N/m^2}

. The longitudinal strain produced in the wire is ____________

\times10^{-5}

Official answer

NTA final key.

Chapter: Mechanical Properties of Solids
Topic: Elasticity
Idea tested: Hooke's Law

Same idea in other shifts

Asked 3× in all

6 Apr 2024, Shift 2 · Q60A wire of cross sectional area $A$ , modulus of elasticity $2\times10^{11}\ \mathrm{Nm^{-2}}$ and length 2 m is stretched between two…HardNumerical valueHas a figure
11 Apr 2023, Shift 1 · Q57The length of a wire becomes $l_1$ and $l_2$ when 100 N and 120 N tensions are applied respectively. If $10\,l_2 = 11\,l_1$ , the natural…MediumNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.