1.

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.            \[\frac{nE}{R+r}\]
Answer» B.                                      \[\frac{nE}{nR+r}\]


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