21
Example 8
Determine the value of RL that will draw the maximum power from
the rest of the circuit shown below. Calculate the maximum power.
2 W
4 W
1 V
+
-
(a)
1 W
3vx
+
-
i
v0
+           -
vx
9 V
+
-
io
1 W
+
VTh
-
+
-
3vx
2 W
+           -
vx
4 W
(b)
Fig. a
=> To determine RTH
Fig. b
=> To determine VTH
*Refer to in-class illustration, textbook, RL = 4.22W, Pm = 2.901W
4.7 Maximum Power Transfer (2)