JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 26 June 2022, Shift 1, Physics Q43

Question 43 of 90 in this shift, Physics question 13 of 30, Section A.

An aluminium wire is stretched to make its length, 0.4% larger. The percentage change in resistance is :

(1)0.4%
(2)0.2%
(3)0.8%Official answer
(4)0.6%

Official answer

Option 3

NTA final key.

Chapter: Current Electricity
Topic: Ohm's Law and Resistance
Idea tested: Small Stretch Approximation for Resistance

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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.