JEE Main 2022 — Current Electricity Question with Solution
From: JEE Main 2022 (Online) 26th July Evening Shift
Question
A potentiometer wire of length is connected in series with a resistance 780 and a standard cell of emf . A constant current flows through potentiometer wire. The length of the null point for cell of emf is found to be . The resistance of the potentiometer wire is ____________ .
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Show full solutionCorrect answer: 20
Step-by-step explanation
cm
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This is a previous-year question from JEE Main 2022, 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.