In the following circuit, the current through the resistor $R(=2 \Omega)$ is $I$ Amperes. The value of $I$ is
A$1$
B$2$
C$3$
D$4$
IIT 2015, Medium
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A$1$
a Equivalent circuit :
$R _{ eq }=\frac{13}{2} \Omega$
So, current supplied by cell $=1 A$
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