Published by:
CGP EDU Academic Team
Published on: August 22, 2026
The resistance of the meter bridge 
in given figure is 
. With a cell of emf 
and rheostat resistance 
the null point is obtained at some point J. When the cell is replaced by another one of emf 
the same null point 
is found for 
. The emf 
is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
So dividing equation (1) and (2)
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