
$10 = 5{i_1} + i$..... $(i)$
Applying in the second mesh
$5{i_1} = 4i - 4{i_1}$...... $(ii)$
Solving equation $(i)$ and $(ii)$, we get
${i_1} = \frac{{40}}{{29}}\,A$

Which of the graphs given below represents current voltage characteristics when $P$ and $Q$ are in series.


