Class Notes (920,083)
US (355,142)
UA (101)
4400 (5)
4400:307 (5)
All (5)
Reference Guide

Electrical Engineering - Reference Guides

4 Pages
4028 Views
Likes

Department
Electrical Engineering
Course Code
4400:307
Professor
All

This preview shows page 1. Sign up to view the full 4 pages of the document.
w w w . p e r m a c h a r t s . c o m
GLOSSARY O F TERMS MECHANICS FUNDAMENTALS
NEWTONS LAWS OF MOTION
Conductor Material which permits electrons to flow freely
Couple Two equal and opposite parallel forces that
are applied to the same body
Dielectric Insulating material between capacitor plates;
capacitance increases by numerical factor, k
(dielectric constant)
Electric Measure of the opposition that an electric
Impedance circuit presents to the flow of current when
voltage is applied
Electromagnetic Oscillations of the inductor’s magnetic
Oscillation field and the capacitor’s electric field
EMF Device Works on charges to maintain a potential
difference between output terminals
Equipotential Adjacent points on a surface with the same
Surface electric potential; electric field is always
perpendicular to equipotential surfaces
Ferromagnetic Substance in which magnetization persists
Material after the field has been removed
Force Vector action of one body on another
Hysteresis Residual magnetism that is left when the
material (such as iron) is slowly demagnetized
Inertia An attribute of bodies implying capacity to
resist changes of motion
Insulator Material that impedes conductance of
electricity
Integrated Complete circuit is contained in a single piece
Circuit of semiconductor material
Magnetic Simplest magnetic structure (such as a bar
Dipole magnet) where net magnetic flux is zero
Mesh In circuit analysis, a loop that has no loop in
its interior
Momentum An attribute that is proportional to the mass
and velocity of a body
Open Circuit Path for current flow between 2 points is
broken
Phasor A vector that rotates around an origin
Principle In a circuit network, a node (junction) with
Node three or more branches
Reactance Circuit property with capacitance and
inductance
Rectification Changing AC to DC by blocking the reverse
flow of a charge
Resonance An oscillation of a system at its natural
frequency
Semiconductor Material that is not conductive nor insulating
Shearing Force In mechanics, a force acting parallel to a
plane
Short Circuit Path for current flow between two points has
zero impedance
Stress In mechanics, the measure of internal forces
of a body between particles resisting
separation
Superconductor Material that presents no resistance to the
movement of electric charge
Torque Turning force or twisting moment
Torsion Torque applied in planes perpendicular to
body’s axis
Transformer Electromagnetic device with 2 or more
mutually coupled windings; it can raise and
lower voltage in a circuit
Law I Bodies will continue in uniform motion unless acted
upon by external forces
Law II The rate of change of a body’s linear momentum is
proportional to, and in the direction of, force applied
F = ma
Law III Forces of action and reaction between bodies are equal
in magnitude, opposite in direction, and collinear
CONDITIONS OF EQUILIBRIUM
• Static equilibrium occurs when the resultants of all external forces
acting on a body are zero
Equilibrium Equations
GEOMETRY OF MOTION
• In mechanics, kinematics is the study of the motions of bodies as
a function of time
MOMENTS OF INERTIA
• Define the relationship between the area or mass of a body and
the position of a line
• Moment of inertia of a figure = sum of moments of its parts
Linear All points of a body follow congruent paths
Rotational Paths circle about an axis; velocity and acceleration
are proportional to the radius
Harmonic Body moves back and forth about a position at rest
Oscillation (amplitude represents maximum deflection)
Base Derivatives of Kinematics
Velocity Where srepresents distance and
trepresents time
Angular Where frepresents the angle
Velocity
Angular Where wrepresents angular velocity
Acceleration
Area Moments of Inertial, I (Statics)
Measuring
the distribution
of area about an axis:
Mass Moments of Inertia, I (Dynamics)
Measuring the moment of inertia
of a volume:
vds
dt
=
ω
=d
dt
φ
ad
dt
=
ω
IydA
x=2
IxdA
y=2
IrdA
z=2
y
0
A
x
ry
dA
x
IrDmrdm=∑=
22
dm
r
Note: Equations are for planar, 2-dimensional, and 3-dimensional
rigid body statics
• Vector relationships for a force system: F= 0 and M= 0
• Written as components along x-, y-, and z-axes, relationships
become Fx= 0, Fy= 0, Fz= 0, Mx= 0, My= 0, and
Mz= 0
Electrical Engineering
Electrical Engineering
l e a r n r e f e r e n c e r e v i e w
ELECTRICAL ENGINEERING • A-816-81© 1996-2011 Mindsource Technologies Inc.

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
Description
l e a r n • r e f e r e n c e • r e v i e w permacharts TM Electrical Engineering GLOSSARY OF TERMS MECHANICS FUNDAMENTALS Conductor Material which permits electrons to flow freely NEWTON’S LAWS OF MOTION Couple Two equal and opposite parallel forces that are applied to the same body Law I Bodies will continue in uniform motion unless acted upon by external forces Dielectric Insulating material between capacitor plates; Law II The rate of change of a body’s linear momentum is capacitance increases by numerical factor, k proportional to, and in the direction of, force applied (dielectric constant) • F = ma Electric Measure of the opposition that an electric Impedance circuit presents to the flow of current when Law III Forces of action and reaction between bodies are equal voltage is applied in magnitude, opposite in direction, and collinear Electromagnetic Oscillations of the inductor’s magnetic CONDITIONS OF EQUILIBRIUM Oscillation field and the capacitor’s electric field EMF Device Works on charges to maintain a potential • Static equilibrium occurs when the resultants of all external forces difference between output terminals acting on a body are zero Equipotential Adjacent points on a surface with the same Equilibrium Equations Surface electric potential; electric field is always perpendicular to equipotential surfaces Note: Equations are for planar, 2-dimensional, and 3-dimensional Ferromagnetic Substance in which magnetization persists rigid body statics Material after the field has been removed • Vector relationships for a force system: ∑ F = 0 and ∑ M = 0 Force Vector action of one body on another • Written as components along x-, y-, and z-axes, relationships Hysteresis Residual magnetism that is left when the become ∑ Fx= 0, ∑ y = 0, ∑zF = 0, x M = 0, y M = 0, and material (such as iron) is slowly demagnetized ∑ Mz= 0 Inertia An attribute of bodies implying capacity to GEOMETRY OF MOTION resist changes of motion Insulator Material that impedes conductance of • In mechanics, kinematics is the study of the motions of bodies as electricity a function of time Integrated Complete circuit is contained in a single piece Linear All points of a body follow congruent paths Circuit of semiconductor material Rotational Paths circle about an axis; velocity and acceleration Magnetic Simplest magnetic structure (such as a bar are proportional to the radius Dipole magnet) where net magnetic flux is zero w Mesh In circuit analysis, a loop that has no loop in Harmonic Body moves back and forth about a position at rest Oscillation (amplitude represents maximum deflection) w its interior Base Derivatives of Kinematics Momentum An attribute that is proportional to the mass w and velocity of a body Velocity ds Where s represents distance and Open Circuit Path for current flow between 2 points is v = dt t represents time . broken p e Phasor A vector that rotates around an origin Angular dφ Where f represents the angle Principle In a circuit network, a node (junction) with Velocity ω = dt r Node three or more branches m Reactance Circuit property with capacitance and Angular a =d ω Where w represents angular velocity inductance Acceleration dt a Rectification Changing AC to DC by blocking the reverse c flow of a charge MOMENTS OF INERTIA h Resonance An oscillation of a system at its natural • Define the relationship between the area or mass of a body and a frequency Semiconductor Material that is not conductive nor insulating the position of a line r • Moment of inertia of a figure = sum of moments of its parts t Shearing Force In mechanics, a force acting parallel to a Area Moments of Inertial, I (Statics)y plane Measuring 2 s Short Circuit Path for current flow between two points has the distribution A dx y∫ A . zero impedance 2 x dA c Stress In mechanics, the measure of internal forces of area about an axiA dy x∫ r y o of a body between particles resisting A dz r∫ 2 separation 0 x m Superconductor Material that presents no resistance to the movement of electric charge Mass Moments of Inertia, I (Dynamics) Torque Turning force or twisting moment Measuring the moment of inertia dm of a volummmdIrr= ∑ =2 ∫ Torsion Torque applied in planes perpendicular to body’s axis r Transformer Electromagnetic device with 2 or more mutually coupled windings; it can raise and lower voltage in a circuit 1 ELECTRICAL ENGINEERING • A-816-8 © 1996-2011 Mindsource Technologies Inc. l e a r n • r e f e r e n c e • r e v i e w permachartsM ELECTROSTATICS CIRCUIT BASICS ELECTRIC CHARGE, Q Circuits Made up of active and passive elements and their interconnecting conducting paths Elementary Charge Active Include sources such as batteries, DC generators, AC generators, and so on • Charge is not fluid; it consists of multiple elementary charges Elements • Any charge q can be written as q = ne, Passive Include current controlling devices such as resistors, capacitors, inductors, where n = positive or negative integer and Elements and so on e = elementary charge Note: e has a value of 1.602 ¥ 10C CIRCUIT ANALYSIS & DESIGN Electric Current (coulomb) Electrostatic Force Current The rate at which electricity flows Magnitude Depends on electromotive force (potential difference) and dimensions of • The charge on any body is measured in relation to the force between two charges path through which it circulates Force: Proportional to the product of the Ohm’s Law I = V/R, where I is the current, V is the electrical potential difference, and two charges; inversely proportional to the R is the resistance square of the distance between them Potential Difference (Electromotive Force, EMF) Coulomb’s Law • In the case of direct current, Ohm’s law defines potential difference as the product of • Relates force, quantity of charge, and current and resistance; commonly used as a measure of the strength of a source of distance of separation such that force electric energy (EMF); here, V = IR between 2 electric charges is p2oportional Resistance to product of22 charges ÷ distancer • Resistance is passive elements in circuits which control current and the degree to which F = q1 2/4πed Newtons a material resists the flow of current ELECTRIC FIELD, E • Used to control flow of current through a circuit; here, R = V/I Resistivity • Charged particles alter their surrounding space • Resistivity is property of a material determines its conductivity • The electric field (or field intensity) can be • To calculate resistance from resistivity, R = pl/A, where p is the resistivity of the material, l is the length, and A is the area found at a point by imagining a particle of charge at rest and measuring the electric force F acting upon it; KIRCHHOFF’S LAWS E = electrostatic force / charge • According to Gauss’ Law, the total electric Current Law Total current flowing into any node in a circuit equals the total current flux of a closed surface in an electric field is flowing away from that node • The algebraic sum of the currents proportional to the sum of the electric entering any node is zero • ∑ I = 0 charges within the surface Voltage Law In a closed circuit, sum of potential drops equals resultant EMF in the loop • The algebraic sum of the potential difference around any closed • Capacitance (C) is the property of an element which opposes changes in circuit is zero • ∑ V = 0 voltage, as given by the equation q = CV, m where q is the charge and V is the THEVENIN’S THEOREM NORTON’S THEOREM potential difference o • A network of sources and resistors at a • A network of sources and resistors at a • A capacitor consists of two isolated pair of terminals can be replaced with pair of terminals can be replaced by a c conductors (plates) with equal and opposite a series combination of a voltage parallel combination of a current source . charges (+q, -q) separated by a dielectric source and resistor and resistor s t r SELECTED QUANTITIES & UNITS a Base Quantities Common Quantities h Quantity Symbol Unit Unit Symbol Quantity Symbol Unit Unit Symbol c Length L, l meter m Charge Q, q coulomb C a Mass M, m kilogram kg Current I, I ampere A m Time T, t second s Potential difference volt V Electric current I ampere A Power P, p watt W r e Temperature Kelvin K Work/Energy W, w joule J Luminous intensity candela cd Resistance R ohm Ω p Plane angle radian rad Conductance ∑ siemens S . Solid angle steradian sr Capacitance C farad F w Magnetic flux F weber Wb Constants w Magnetic field B tesla T Constant Symbol Value Force F Newton N w Elementary charge e 1.60 ¥ 1019C -11 2 2 Flux density B tesla T Gravitational constant G 6.67 ¥ 10 Nm /kg Inductance L henry H Permittivity constant e 8.85 ¥ 1012F/m 6 Frequency ƒ hertz Hz Permeability constant µ0 1.26 ¥ 10 H/m Angular frequency w radians/second rad/s Electron mass m e 9.11 ¥ 1031kg Proton mass m 1.67 ¥ 1027kg Electromotive force EMF volt V p 2 ELECTRICAL ENGINEERING • A-816-8 © 1996-2011 Mindsource Technologies Inc. l e a r n • r e f e r e n c e • r e v i e w permachartsM E
More Less
Unlock Document


Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit