ECE 301, Fall 2016, Quiz 4
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September 26 , 2016
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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 energ
ECE 301, Fall 2016, Quiz 6
Solutions
Problem 1
(a) 33.33 Hz
(b) 30 ms
(c) 209.44 rad/s
(d) 60
(e) 20 V
(f ) 14.14 V
(g) v(t) = 20 cos (209.44t + 60 ) V
(h) V = 2060 V
Problem 2
(a) Z1 = j50 , capacito
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 po
ECE 301, Fall 2015, Quiz 1
8/26/2015
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credi
ECE 301, Fall 2015, Quiz 2
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September 2, 2015
It is necessary to show the steps to solve the problems. A nal correct answer without the solving
process will not
ECE 301, Fall 2015, Test 1
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September 16, 2015
It is necessary to show the steps to solve the problems. A nal correct answer without the solving
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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
Probl
ECE 301, Fall 2016, Quiz 5
Solutions
Problem 1
(a) vC (t) = 40e400t V, for t > 0
(b) iC (t) = 80400t mA, for t > 0
(c) vR (t) = 40e400t V, for t > 0
Problem 2
(a) vL = 0, iL = 157.14 mA, vC = 78.57 V,
HOMEWORK SOLUTIONS
ECE 301, Spring 2017
Homework #5
Problem 3.14.
The current through a 0.5-F capacitor is shown in Figure P3.14. At t = 0, the voltage is zero. Sketch the
voltage, power, and stored e
ECE 301, Spring 2017, Test 1
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th
February 10 , 2017
It is necessary to show the steps to solve the problems. A final correct answer without the solving
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ECE 301, Spring 2017, Quiz 3
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st
February 1 , 2017
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ECE 301, Spring 2017, Quiz 5
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February 27 , 2017
It is necessary to show the steps to solve the problems. A final correct answer without the solving
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ECE 301, Spring 2017, Quiz 4
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February 17 , 2017
It is necessary to show the steps to solve the problems. A final correct answer without the solving
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HOMEWORK SOLUTIONS
ECE 301, Spring 2017
Homework #7
Problem 4.9
Find an expression for v(t) for the circuit shown in Figure P4.9 and sketch v(t) to scale versus time.
Figure P4.9.
Solution
Prior to t
ECE 301, Spring 2017, Quiz 1
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January 18 , 2016
It is necessary to show the steps to solve the problems. A final correct answer without the solving
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ECE 301, Fall 2015, Test 1
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September 16, 2015
It is necessary to show the steps to solve the problems. A nal correct answer without the solving
process will no
ECE 301, Fall 2015, Quiz 7
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October 14, 2015
It is necessary to show the steps to solve the problems. A nal correct answer without the solving
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Summary of Power Equations
ECE 300 and ECE 301
wlg
Real Power:
[VP [P I
P=l Vrms H [m [coma8,) = TcoswV 49,)
P=l S j 005(9V (9l) = Re[S]
where S is the complex power
A
IIPIZ [ijz
P: T! ZleosUQV