ECE 325, Fall 2015, Final Exam
Name_
The test has 120 points. Please finish as many problems as possible for more points.
Problem 1 (40 points): Short answer questions
a. (3 points each) True or false (circle one) for these statements about a 4-pole squir
ECE 325, Fall 2016, Test 1
Problem 1 (35 points, 5 points each): Circle ALL correct statements (reasons are NOT required)
a. For long distance power transmission, HVAC is always a more economical option than HVDC.
(At present, the cross-over point for HVD
ECE 325, Fall 2015, Test 2
Problem 1 (40 points): Short answer questions
a. (3 points each) True or false for each of the following statements?
1) Analogous to the electrical resistance of a conductor, the magnetic reluctance Rm of an iron
core placed in
Total: 10 points. 3 points off for one mistake, 6 points off for two mistakes.
Total: 10 points. 3 points off for one mistake, 6 points off for two mistakes.
Total: 10 points. 2 points for the figure, 2 points for the formula of voltage, 2
points for each
e L appears to be the load. It is not the load because E and
I are 180o out of phase. Therefore L is the active source.
f N appears to be the load. It is the load because I lags 90o
behand E. Therefore M is a reactive source.
Total: 15 points. 2.5 points
Total: 10 points. The formula covers 8 points.
Total: 10 points. 4 points for the calculations. 6 points for the formulas.
Total: 15 points. 5 points for each subproblem.
Total: 15 points. 7.5 points for each subproblem.
Total: 20 points. 5 points for eac
ECE 301, Spring 2017, Quiz 1
Write your name on the back of the quiz.
th
January 18 , 2016
It is necessary to show the steps to solve the problems. A final correct answer without the solving
process will not be credited unless the answer is straightforwar
ECE 301, Fall 2016, Quiz 3
Solutions
Problem 1
(a) There are 6 nodes, and 5 unknown node voltages.
(b) There are 2 meshes, and 2 unknown mesh currents.
(d)
R1 + R2 + R3 R3 i1
V
= S1
0
1
i2
IS2
Problem 2
P = 147.35 mW
1
ECE 301, Spring 2016, Quiz 1
Solutions
Problem 1
(a) pa = 648 W. The element absorbs power.
(b) ib = 635 mA
(c) vc = 120.25 V
Problem 2
(b) At t = 200 ms, p = 200 mW, absorb power.
(c) The total energy is: w = 80 mJ, absorbed.
1
ECE 301, Fall 2016, Quiz 8
Solutions
Problem 1
(a) vo = 1.8 V
(b) Ri = 2.5 k
(c) Ro = 0
(d) PL = 3.24 mW
Problem 2
(a) vo = 9 V
(b) Ri =
(c) Ro = 0
(d) PL = 81 mW
1
ECE 301, Fall 2016, Quiz 4
Solutions
Problem 1
(a) vL (1 ms) = 50 V
pL (1 ms) = 1250 W
wL (1 ms) = 625 mJ
The inductor is being charged because pL (1 ms) is positive. It acts as a load, and absorbs power.
(b) vL (8 ms) = 0
pL (8 ms) = 0
wL (8 ms) = 625 mJ
1.
Youre trying to determine whether or not to
expand your business by building a new
manufacturing plant. The plant has an
installation cost of $20.6 million, which will be
depreciated straight-line to zero over its fouryear life.
Required:
If the plant
8.1.2: This is same as the question. Just copied the results.
8.1.3: In this, we had to determine the current through R_SC
The current R_SC is 0.00502848 =5.028mA
8.1.4: V_TH is the Thevenin Voltage =V(B)= 4.14256V
and R_TH=V_TH/I_SC =4.14256/5.028mA= 823
Q No.
Answer
1
2
3
1
1
0
4D
5C
6B
7C
8D
9D
10 D
11 B
12 C
13 D
14 D
15
16
17 3-terminal
18 pinch off voltage
19 Shockley'sequaton
20 Thersold voltage
Explanaton
The G-S juncton is Reverse biased
The Vgs controls the current through transistors
It is the o
FEATURE I ELECTRICAL SUBSTATIONS
Standards addressing design and
measurement procedures
ermmmmmmmemm
mmmmuwmm
minding systems are a cnnialy important component
otanypowermply system. becametheydrectly
Impact public and employee safety. supply system
relia
Probability Space
A sample space 9 is a nonempty set. If a) is an element of Q, then cfw_to is an elementary
event (corresponding to 9) which contains the outcome w (of Q). A nonempty set need not
be a sample space; the sample space is chosen as part of a
ECE 201, Fall 2015, Test 2
Write your name on the back of the test.
October 7, 2015
It is necessary to show the steps to solve the problems. A final correct answer without the solving
process will not be credited unless the answer is straightforward.
Prob
ECE 201, Fall 2015, Quiz 3
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September 16, 2015
It is necessary to show the steps to solve the problems. A final correct answer without the solving
process will not be credited unless the answer is straightforward.
P
ECE 201, Fall 2015, Test 1
Write your name on the back of the test.
September 11, 2015
It is necessary to show the steps to solve the problems. A final correct answer without the solving
process will not be credited unless the answer is straightforward.
P
ECE 201, Fall 2015, Quiz 4
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September 25, 2015
It is necessary to show the steps to solve the problems. A final correct answer without the solving
process will not be credited unless the answer is straightforward.
P
ECE 201, Fall 2015, Test 1
Write your name on the back of the test.
September 11, 2015
It is necessary to show the steps to solve the problems. A final correct answer without the solving
process will not be credited unless the answer is straightforward.
P
ECE 201, Fall 2015, Quiz 5
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October 2, 2015
It is necessary to show the steps to solve the problems. A final correct answer without the solving
process will not be credited unless the answer is straightforward.
Prob
ECE 201, Fall 2015, Quiz 2
Write your name on the back of the quiz.
September 2, 2015
It is necessary to show the steps to solve the problems. A final correct answer without the solving
process will not be credited unless the answer is straightforward.
Pr