JEE Main 2022 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 27 June 2022, Shift 1, Physics Q55

Question 55 of 90 in this shift, Physics question 25 of 30, Section B.

A cell, shunted by a

8\ \Omega

resistance, is balanced across a potentiometer wire of length 3 m. The balancing length is 2 m when the cell is shunted by

4\ \Omega

resistance. The value of internal resistance of the cell will be __________

\Omega

Official answer

NTA final key.

Chapter: Current Electricity
Topic: Potentiometer
Idea tested: Internal Resistance Measurement

Same idea in other shifts

Asked 3× in all

4 Apr 2024, Shift 1 · Q50To measure the internal resistance of a battery, potentiometer is used. For $R = 10\ \Omega$ , the balance point is observed at $l = 500$ …MediumSingle correct
30 Jun 2022, Shift 1 · Q56The circuit diagram of potentiometer used to measure the internal resistance of a cell (E) is shown in figure. The key ‘K’ is kept closed…MediumNumerical valueHas a figure

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.