JEE Main 2021 — Current Electricity Question with Solution
JEE Main 2021 (25 Jul Shift 2)
Question
In the given potentiometer circuit arrangement, the balancing length is measured to be . When the galvanometer connection is shifted from point (1) to point (2) in the given diagram, the balancing length becomes . The ratio of the emf of two cells is:
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Current Electricity chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
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.