The resistance in following circuit are 
. The emf of the battery is 
. When switch S is closed, the potential across resistance 
is changed by an amount.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
When switch S is open
Net resistance 
Current 
Potential across 
is
After switch is closed
Total resistance is here
Current passing through cell 
So, potential across 
So, change in potential of 
is
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