ECE252-01
Due 10th of July
Homework-07
1. Sketch and label a half-wave rectifier circuit. Use an ideal diode and a 3 V rms source.
Explain how the circuit works. Show the voltage wave forms in a diagram. (4pts)
2. Repeat Problem 1 if a silicon diode is us
ECE252-01
Homework-05
Due 24th of June
1. Determine the current drawn from a three-phase 440V line by a three-phase 15-hp motor
operating at full-load, 90% efficiency, and 0.80 power factor lagging. Find the values of P
and Q drawn from the line.
(15pts)
EQE 252 Introduction to Electrical Engineering Quiz 13BP
100 Points Show your work. Practice
SOIL/Wave
A three-phase, delta-connected generator is connected through power lines to a balanced Y-connected
load. The net load consumes 3 kW at a power factor o
Lesson 7. Inductors and
Capacitors and Their Uses
Introduction
Note that the sign convention is the same for all devices-current
goes in the positive end.
Inductors
A coil of wire, with or without a core made of iron or ferrite.
Deliberate inductance (or
Lesson 2. Resistors in Series and
Parallel
Resistors in Series
Resistor in Parallel
Resistor Circuit Examples
General method for finding resistance
between two points.
Find the resistance between A and B.
Steps
Identify, circle and label nodes.
Identify a
Lesson 6. Thevenin's Theorem,
Maximum Power Transfer, and
Superposition
Source Transformation
Thevenin and Norton Equivalents
This refers to circuit where you are interested in the voltage and
current at a pair of terminals ( a 2-terminal network). This
h
Lesson 12. Power in AC
Circuits
Preview-The Power Triangle
P=power-real power in watts. It is also
called average power. This is the power
that can get work done. Resistors/Loads
Q=reactive power in VARs (volt-amps
reactive). This is really an energy stor
Lesson 13B. Three-Phase
Power
Sketch showing 3 overhead
lines:
Most electric power is transmitted over
high voltage three-phase lines. This
method of power transmission is more
efficient than single phase power, as you
might use in your home.
Why use thre
ECE 252-01
Introduction to Electrical
Engineering for Summer-2013
Lesson 1. Basic Elements and
Circuit Laws
The Physics of Electricity
There are six basic metric units.
-m, kg, s, A, K, Cd
All other units are derived from these.
Charge of an electron?
Vol
Lesson 16. Computer
Circuits
Base Conversion by Example
Binary to Decimal
Decimal to Binary
The MOSFET
A basic building block of most computers
is the metal-oxide semiconductor fieldeffect transistor (MOSFET). A simplified
diagram of a MOSFET is shown bel
Lesson 12. Power in AC
Circuits
Preview-The Power Triangle
P=power-real power in watts. It is also
called average power. This is the power
that can get work done. Resistors/Loads
Q=reactive power in VARs (volt-amps
reactive). This is really an energy stor
Lesson 3. Circuit Solving with
Kirchhoff's Laws
Completely Solving Circuit
Example 01
Completely Solving Circuit
Example 02
More
Planar and nonplanar circuits
ECE 252 Introduction to Electrical Engineering Final l4F-2
426 Points Name
You may use one sheet of notes and your calculator. Fill in the blanks, circle the correct answers,
etc.
1. (40) Quickies:
a) Current through a (an) cannot be changed instantaneous
ECE 252 Introduction to Electrical Engineering Final-13F-2
435 Points Show your work. Name
Fill in the blanks, circle the correct answers, etc.
1. (15) RAB = . The answer is an integer.
A i w 10:2. MW,
2. (15) An 8bit AID converter has Vref+ = 7 V and Vre
ECE 252 Introduction to Electrical Engineering Final-1484
449 Points Show your work. Name
Fill in the blanks, circle the correct answers, etc.
1. (8) An eiectric heater with a resistance of 70 Q wiil use joules of energy in 3 minutes when
plugged into a 1
ECE 252 Introduction to Electrical Engineering Final-l4F1
386- Points Show your work. Name
Fill in the blanks, circle the correct answers, etc.
I. (20) l )0); . 5:! Fine the resistance between A .ad B. The answer is
an mteger.
Z)?
803.
ICU?-
3 0.);
A 12
ECE 252 Introduction to Electrical Engineering Final-lSFZ
482 Points Show your work Name
You may use one sheet of notes and your calculator. Fill in the blanks, circle the correct answer, etc.
1. (172) Quickies
a) When a resistor is short-circuited, its v
ECE 252 Introduction to Electrical Engineering Final-I6S-2
515 Points Show your work. Name
Fill in the blanks. circle the correct answers, etc.
1. (194) Quickies
a) Sketch and label an NPN BJT.
b) A NiCd 1.2 V battery draws 55 mA in a hobby application. I
ECE 252 Introduction to Electrical Engineering Final1484
388 Points Show your work. Name
Fill in the blanks, circle the correct answers, etc.
1. (15) Transform the network into the phasor domain. Sketch and label the transformed network.
S'OW I7
@
1706:
ECE 252 Introduction to Electrical Engineering Final-16S-1
545 Points Show your work Name
You may use one sheet of notes and your calculator. Fill in the blanks, circle the correct answer, etc.
1. (176) Quickies
a) A certain amplier has a voltage gain of
ECE 252 Introduction to Electrical Engineering Final 15F-1
469 Points Name
You may use one sheet of notes and your calculator. Fill in the blanks. circle the correct answer, etc.
1. (185) Quickies
a) 480 coulombs of charge ows through a wire at a constant
Lesson 17. Solid State
Devices
Diodes
Diodes easily carry current in the forward
direction, the direction of the arrow, but
block current in the reverse direction.
Frequently it is useful to consider the diode
as an ideal device.
Ideal diodes have the fol
Lesson 11. AC Circuits
Example AC Circuit:
The Phasor
Restrictions:
Sinusoids only
Wait a long time (usually milliseconds)
Linear elements only (ex: no diodes)
Only one frequency
How to do transform:
Impedance
Complex version of resistance is called imped
ECE252-01
Homework-06
Due on 1st of July
1. Design and sketch a high-pass filter with a cutoff frequency of 1000 Hz. Use a 10 F
capacitor and an appropriate resistor. What is the gain of the filter at the cutoff
frequency? Give your answer both as a ratio
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by Ca
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by Ca
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by Ca
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by CamScanner from intsig.com
Generated by Ca
Electrical Safety
Thomas G. Cleaver
University of Louisville
Department of Electrical and Computer Engineering
July 11, 2011
2011 Thomas G. Cleaver. All rights reserved.
Are these birds safe?
Image found at HTTP: http:/davin.ws/~krishen/blog/pictures/bird