Five cells each of e. $\mathrm{mf} E$ and internal resistance $r$ are connected in series. If due to

Question

Five cells each of e. $\mathrm{mf} E$ and internal resistance $r$ are connected in series. If due to oversight, one cell is connected wrongly, then the equivalent e. m. f. and internal resistance of the combination is\

Professor PC Thomas Classes · Answer

Net voltage $=4 \mathrm{E}-\mathrm{E}=3 \mathrm{E}$\ Total resistance $=5 \mathrm{r}$\