• # question_answer n identicals cells, each of emf and internal resistances are joining in series to form a closed circuits as shown. The potential difference across any one cells is: A)  zero                            B)  $\varepsilon$C)  $\frac{\varepsilon }{N}$                              D)  $\frac{n-1}{n}\varepsilon$

For the combination, $1=\frac{n\varepsilon }{nr}=\frac{\varepsilon }{r}.$ and $V=\varepsilon -Ir=0$ (Because of closed loop)