JEE Main 2024 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 27 January 2024, Shift 1, Physics Q50

Question 50 of 90 in this shift, Physics question 20 of 30, Section A.

A wire of length 10 cm and radius

\sqrt{7}\times10^{-4}

m is connected across the right gap of a meter bridge. When a resistance of 4.5

\Omega

is connected on the left gap by using a resistance box, the balance length is found to be at 60 cm from the left end. If the resistivity of the wire is

R\times10^{-7}

\Omega

m, then value of R is :

(1)35
(2)63
(3)66Official answer
(4)70

Official answer

Option 3

NTA final key.

Chapter: Current Electricity
Topic: Wheatstone Bridge
Idea tested: Resistivity Calculation via Meter Bridge

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