a
આકૃતિમાં દર્શાવ્યા મુજબ  \({\text{PQR}}\)   ભાગનો અવરોધ  \({R_1} = \frac{{10}}{4} = 2.5\,\Omega \,\,\)

અને \(\,{\text{PMQ}}\)  ભાગનો અવરોધ  \( \Rightarrow {\text{ }}{R_2} = \frac{3}{4} \times 10 = 7.5\,\Omega \)

\({R_{eq}} = \frac{{{R_1}{R_2}}}{{{R_1} + {R_2}}} = \frac{{2.5 \times 7.5}}{{(2.5 + 7.5)}}\,\, = \,\,\frac{{15}}{8}\,\Omega \)

મુખ્ય પ્રવાહ \(i\,\,\, = \,\,\,\,\frac{3}{{\frac{{15}}{8} + 1}} = \frac{{24}}{{23}}\,A\,\,\,\)

\( \Rightarrow \) માટે \(i \times \left( {\frac{{{R_2}}}{{{R_1} + {R_2}}}} \right)\)

\( = \frac{{24}}{{23}} \times \left( {\frac{{7.5}}{{2.5 + 7.5}}} \right)\,\, = \,\,\frac{{18}}{{23}}\,A\,\,\,\)

\(\therefore \,\,\,{i_2} = \,\,i - {i_1} = \,\,\frac{{24}}{{23}} - \frac{{18}}{{23}} = \frac{6}{{23}}\,A\)