A series combination of two resistors $1\,\Omega $ each is connected to a $12\,V$ battery of internal resistance $0.4\,\Omega $. The current flowing through it will be ............... $A$
A$3.5$
B$5$
C$6$
D$10$
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B$5$
b (b) $i = \frac{{12}}{{(1 + 1) + 0.4}} = 5\,A.$
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