Published by:
CGP EDU Academic Team
Published on: September 12, 2026
To measure the internal resistance of a battery, potentiometer is used. For 
, the balance point is observed at 
and for 
the balance point is observed at 
. The internal resistance of the battery is approximately:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Let potential gradient be λ.
Also, 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Which of the following will NOT be observed when a multimeter (operating in resistance measuring mo…
A galvanometer of resistance G is converted into a voltmeter of range by connecting a resistance …
A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on…
In a building there are bulbs of , bulbs of , small fans of and heaters of . The voltage of…
The length of a potentiometer wire is and it carries a current of . For a cell of emf and intern…
A galvanometer having a coil resistance gives a full-scale deflection when a current of is passed…