JEE Main 2022 — Current Electricity Question with Solution
From: JEE Main 2022 (Online) 24th June Evening Shift
Question
A potentiometer wire of length 10 m and resistance 20 is connected in series with a 25 V battery and an external resistance 30 . A cell of emf E in secondary circuit is balanced by 250 cm long potentiometer wire. The value of E (in volt) is . The value of x is __________.
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Show full solutionCorrect answer: 25
Step-by-step explanation
volts
volts
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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.