JEE Main 2023 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 11 April 2023, Shift 1, Physics Q57

Question 57 of 90 in this shift, Physics question 27 of 30, Section B.

The 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 length of wire will be

\frac{1}{x}\,l_1

. Here the value of

x

is ___________

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
6 Apr 2023, Shift 1 · Q58A 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…EasyNumerical 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.