(2)

Step 1:

Find the Nortons short circuit current.

1. Short the load resistor.

2. Calculate the Short Circuit Current. This is the Norton Current (I_N).

Redraw the circuit :

Use the source transformation to convert the current source to equivalent voltage source.

Voltage across the resistor R₂ is .

Step 2:

Find the total circuit current : .

Voltage V = 136 +75

V = 211 V

Nortons equivalent resistance is .

Step 3:

Find the Current through the resistor R₃.

Use the CDR (current division rule ) to find the Current through the resistor R₃.

Norton short circuit current is .

Nortons current is .

Solution :

 Nortons current is .