JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 15 April 2023, Shift 1, Physics Q34

Question 34 of 90 in this shift, Physics question 4 of 30, Section A.

A wire of length 'L' and radius 'r' is clamped rigidly at one end. When the other end of the wire is pulled by a force

f

, its length increases by 'l'. Another wire of same material of length '2L' and radius '2r' is pulled by a force '2f'. Then the increase in its length will be :

(1) $l$ Official answer
(2) $2l$
(3) $4l$
(4) $l/2$

Official answer

Option 1

NTA final key.

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

Same idea in other shifts

Asked 5× in all

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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 108 of the 174 JEE Main shifts held from 2017 to 2026.