Medium
$n$ identical cells each of $e.m.f.$ $E$ and internal resistance $r$ are connected in series. An external resistance $R$ is connected in series to this combination. The current through $R$ is
- A$\frac{nE}{R + nr}$
- B$\frac{nE}{nR + r}$
- C$\frac{E}{R + nr}$
- D$\frac{nE}{R + r}$
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