In the Circuit Shown Below, Let Find the Norton Equivalent Current

Essay

In the circuit shown below, let $$I _ { 5 } = 5 \mathrm {~mA} , \mathrm { R } _ { 1 } = 500 \Omega , \mathrm { R } _ { 2 } = 300 \Omega , \mathrm { R } _ { 3 } = 600 \Omega , \mathrm { R } _ { 4 } = 400 \Omega$$
Find the Norton equivalent current $\mathrm { I } _ { \mathrm { n } }$ and the Norton equivalent resistance $\mathrm { R } _ { \mathrm { n } }$ between terminals $a$ and $b$ .