JEE Main 2023 — Current Electricity Question with Solution
From: JEE Main 2023 (Online) 13th April Morning Shift
Question
When a resistance of is shunted with a moving coil galvanometer, it shows a full scale deflection for a current of , however when resistance is connected with it in series, it gives full scale deflection for 25 volt. The resistance of galvanometer is ____________ .
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Show full solutionCorrect answer: 50
Step-by-step explanation
Equating the two expressions for current, :
This equation simplifies to:
Solving for the resistance of the galvanometer, :
So, the resistance of the galvanometer is .
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This is a previous-year question from JEE Main 2023, 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.