Two sources of equal emfs are connected in series. This combination is connected to an external resistance R. The internal resistances of the two sources are r 1 and r 2 (r 1 > r 2 ). If the potential difference across the source of internal resistance r 1 is zero then the value of R will be
A
r 1 -r 2
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
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