JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 28 July 2022, Shift 1, Physics Q41

Question 41 of 90 in this shift, Physics question 11 of 30, Section A.

A wire of resistance

R_1

is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is :

(1)9 : 1Official answer
(2)1 : 9
(3)4 : 1
(4)3 : 1

Official answer

Option 1

NTA final key (2022 Session 2).

Chapter: Current Electricity
Topic: Ohm's Law and Resistance
Idea tested: Resistance of Stretched Wires

Same topic in other shifts

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