JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 27 July 2022, Shift 2, Physics Q37

Question 37 of 90 in this shift, Physics question 7 of 30, Section A.

A steel wire of length 3.2 m (

Y_s=2.0\times10^{11}

^{-2}

) and a copper wire of length 4.4 m (

Y_c=1.1\times10^{11}

^{-2}

), both of radius 1.4 mm are connected end to end. When stretched by a load, the net elongation is found to be 1.4 mm. The load applied, in Newton, will be : (Given

\pi=\frac{22}{7}

)

(1)360
(2)180
(3)1080
(4)154Official answer

Official answer

Option 4

NTA final key.

Chapter: Mechanical Properties of Solids
Topic: Elasticity
Idea tested: Series and Parallel Composite Wires

Same idea in other shifts

Asked 7× 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.