JEE Main 2019 — Current Electricity Question with Solution
From: JEE Main 2019 (Online) 10th January Morning Slot
Question
A potentiometer wire AB having length L and resistance 12 r is joined to a cell D of emf and internal resistance r. A cell C having emf /2 and internal resistance 3r is connected. The length AJ at which the galvanometer as shown in figure shows no deflection is –
This question includes a diagram. The text above accompanies the figure.
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Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
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This is a previous-year question from JEE Main 2019, covering the Current Electricity chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.