Question

Find the current in each branch ?

Answer 1

Ref. image

By star method

$AC=\frac{5\times 5\times 5+5\times 5}{5}\Rightarrow \frac{75}{5}=15$

$AB=15$

$AC=15$

Ref. image

$\begin{array}{c}{R}_{net}=6.13\\ i=\frac{v}{r}=\frac{540}{6.13}\\ \therefore i=8.1459A\end{array}$