In the arrangement shown in figure when the switch 
is open, the galvanometer shows no deflection for 
When the switch 
is closed, the galvanometer shows no deflection for 
. The internal resistance 
of 6 V cell, and the emf 
of the other battery are respectively
A
3 
B
C
2 
D
Text Solution
Verified by ExpertsThe correct answer is:
B
When 
open
Assume resistance of 
Resistance of wire per unit length. 
Now in 
When 
closed
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