JEE Main 2021 — Current Electricity Question with Solution
From: JEE Main 2021 (Online) 17th March Evening Shift
Question
The four arms of a Wheatstone bridge have resistances as shown in the figure. A galvanometer of 15 resistance is connected across BD. Calculate the current through the galvanometer when a potential difference of 10V is maintained across AC.
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: B
Correct answer
B4.87 mA
Step-by-step explanation
__________ (1)
Similarly,
__________ (2)
after solving equation (1) & (2)
VD = 0.79 volt
VB = 0.86 volt
Then the current through the galvanometer
= 4.87 mA
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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.