JEE Main 2021 — Current Electricity Question with Solution
From: JEE Main 2021 (Online) 25th July Evening Shift
Question
In the given potentiometer circuit arrangement, the balancing length AC is measured to be 250 cm. When the galvanometer connection is shifted from point (1) to point (2) in the given diagram, the balancing length becomes 400 cm. The ratio of the emf of two cells, is :
This question includes a diagram. The text above accompanies the figure.
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Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
.... (i)
.... (ii)
.... (ii)
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This is a previous-year question from JEE Main 2021, 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.