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Exam 2 Practice Problems
For Problems 121, use the figures at the end of this document.
1.
Calculate the power dissipated by each resistor in
Figure 1.
Resistor
Power
2
Ω
2.40W
10
Ω
0.100W
5
Ω
5.00W
8
Ω
6.50W
3
Ω
1.30W
2.
Calculate the power being delivered by the each voltage and current source in
Figure 2.
Source
Power
Delivering/Absorbing
10V
65.0W
Delivering
2.5A
23.8W
Delivering
4A
134.W
Delivering
3.
Calculate the power being delivered by each current source in
Figure 3.
Source
Power
Delivering/Absorbing
5mA
121. mW
Delivering
2mA
54.8 mW
Delivering
4.
Using
Figure 4
, find the power delivered or supplied by the 10V source.
P
10V
= 8.40 mW (8.40mW delivered)
5.
Calculate the power being delivered or absorbed by the voltage sources in
Figure 5
.
Source
Power
Delivering/Absorbing
8V
14.4W
14.4 W delivered
3V
14.4W
absorbed
6.
Find the power absorbed by each resistor in
Figure 6
.
Resistor
Power
10
Ω
0 W
40
Ω
160. W
20
Ω
80.0 W
7.
Prove that power is conserved in
Figure 7.
W
400
P
P
absorbed
delivered
=
=
∑
∑
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View Full DocumentExam 2 Practice Problems
8.
Find the power being delivered by the 5A source in
Figure 8.
P
5A
= 95.5W (95.5W delivered)
9.
Find V
yx
in
Figure 9
V
yx
= 32.8V
10.
Find R
1
in
Figure 10
such that V1=20V.
R
1
= 4.00
Ω
11.
Find V
yx
in
Figure 11
V
yx
= 8V
12.
Find the power being absorbed by each of the resistors in
Figure 12
Resistor
Power
R1 (20
Ω)
1.25W
5
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 Fall '06
 MCCANN
 Electrical Engineering

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