UNIVERSITY OF MASSACHUSETTS DARTMOUTH
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
ECE 201
CIRCUIT THEORY I
CLASSROOM PROBLEM #1
•
The voltage across the 22.5 Ω resistor is 90 Volts as shown.
+
R1
4 Ohm
90V
R2
22.5 Ohm
-
Vsource
240 V
R5
5 Ohm
R3
20 Ohm
R4
15 Ohm
•
a)
Find the power dissipated in each resistor.
•
b)
Find the power supplied by the 240 V ideal voltage source.
•
c)
Verify that the power supplied equals the power dissipated.