Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The length of a potentiometer wire is 
and it carries a current of 
. For a cell of emf 
and internal resistance of 
, the null point on it is found to be at 
. The resistance of whole wire is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
JEE Main 2020
Potential gradient 
and 
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