Question #3
4.90 The variable resistor in the circuit in Fig. P4.90 is adjusted for maximum power transfer
to R..
a. Find the numerical value of R..
b. Find the maximum power delivered to R..
c. How much power does the 280 V source deliver to the circuit when R, is adjusted to
the value found in (a)?
Figure P4.90
Answer
R = 35 Ω.
505 W
21364 W delivered.
50i
10 Ω
5Ω
20 Ω
+ UA
100 Ω
+
280 VER
$400 Ω 0.51250