JEE Main 2017 — Current Electricity Question with Solution
From: JEE Main 2017 (Online) 9th April Morning Slot
Question
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: D
Step-by-step explanation
Initially, the resistance P = 4 and the neutral point N is at 60 cm from A. Therefore,
When an unknown resistance R is connected in series to P and the new position of the neutral point is at 80 cm from A, we have
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This is a previous-year question from JEE Main 2017, 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.