Thevenin

Question

Find Eth step by step.

Answer 1

(2)

Step 1:

Find the thevinins equivalent voltage.

1.Open the load resistor.

2.Calculate the Open Circuit Voltage. This is the Thevenin Voltage (V_TH).

Redraw the circuit :

 

The netwrok has two independent loops.

Find the current in each loop.

Loop 1:

Voltage at node A  :

Step 2:

Loop 2:

Voltage at node B  :

Step 3:

Find Thevenin Voltage (V_TH).

Thevenin Voltage V_TH  = V_A + V_B .

V_TH  = -2 - 6

V_TH  = -8 V.

Therefore Thevenin Voltage V_TH  = - 8 V.

Solution :

Thevenin Voltage is V_TH  = - 8 V.