question_answer

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 [DPMT 2002]

A)                    \[\frac{nE}{R+nr}\]

B)                                      \[\frac{nE}{nR+r}\]

C)                    \[\frac{E}{R+nr}\]       

D)            \[\frac{nE}{R+r}\]