See the electrical circuit shown in the adjoining figure. Which of the following equation is a correct equation for it
Medium
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Applying Kirchhoff's equation to the loop $\mathrm{ABFE},$
$-\left(\mathrm{i}_{1}+\mathrm{i}_{2}\right) \mathrm{R}-\mathrm{i}_{1} \mathrm{r}_{1}+\mathrm{E}_{1}=0$
or $\mathrm{E}_{1}-\left(\mathrm{i}_{1}+\mathrm{i}_{2}\right) \mathrm{R}-\mathrm{i}_{1} \mathrm{r}_{1}=0$
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