EET 110 – Survey of EET 110 – Survey of ElectronicsElectronics
Chapter 1Chapter 1
Basics of ElectricityBasics of Electricity
IntroductionIntroductionElectrical SystemsElectrical Systems– DiagramsDiagrams
Block (system)Block (system)
PictorialPictorial
SchematicSchematic
– ComponentsComponentsSourceSource
PathPath
ControlControl
LoadLoad
IndicatorIndicator
Energy, Work and PowerEnergy, Work and Power
EnergyEnergy– Kinetic EnergyKinetic Energy– Potential EnergyPotential Energy– Chemical EnergyChemical Energy
Work Work – Conversion of EnergyConversion of Energy
PowerPower– Rate at which work is doneRate at which work is done
Structure of MatterStructure of Matter
AtomAtom– Mode of AtomMode of Atom– ElectronsElectrons– NucleusNucleus
NeutronsNeutrons
ProtonsProtons
– OrbitOrbit– Valence LayerValence Layer
Electrical ChargesElectrical Charges
Like charges repelLike charges repel
Opposites attractOpposites attract
Each charge is surrounded by an Each charge is surrounded by an electrostatic fieldelectrostatic field
Static ElectricityStatic Electricity
A collection of charged particles A collection of charged particles accumulated on a materialaccumulated on a material
ExamplesExamples– LightningLightning– Dry Montana effectDry Montana effect
Electrical CurrentElectrical Current
Movement of electrons – current flowMovement of electrons – current flow
Potential for electrons to flow – Potential for electrons to flow – voltage or electrical potentialvoltage or electrical potential
ConductorsConductors– Single electron in valence layerSingle electron in valence layer
Insulator Insulator – Full valence layerFull valence layer
Other materialOther material
SemiconductorsSemiconductors– Exactly four electrons in the valence Exactly four electrons in the valence
layerlayer
SuperconductorsSuperconductors– The Holy Grail of electronicsThe Holy Grail of electronics– No resistance AT ALLNo resistance AT ALL
Electrical CircuitsElectrical Circuits
Conventional Current FlowConventional Current Flow
Electron flowElectron flow
ChargeCharge– 1 coulomb = 6.25x101 coulomb = 6.25x101818 electrons electrons
Rate of electron flowRate of electron flow– 1 Ampere or 1 Amp = 1 Coulomb per 1 Ampere or 1 Amp = 1 Coulomb per
secondsecond
Electro-Motive ForceElectro-Motive Force
EMF EMF
Voltage Voltage
Electrical PotentialElectrical Potential
Measured in VoltsMeasured in Volts
ResistanceResistanceThe opposition to current flowThe opposition to current flowDependent onDependent on– Material Material – LengthLength– AreaArea– TemperatureTemperature
Measured in OHMSMeasured in OHMSThe inverse of conductance (Mhos or The inverse of conductance (Mhos or Siemens)Siemens)
FormulasFormulas
Current is given as ICurrent is given as I
Voltage as either V or EVoltage as either V or E
Resistance as RResistance as R
AssignmentAssignment
Read Chapter 2 – complete review Read Chapter 2 – complete review questionsquestions
Locate the web pageLocate the web page
techsci.msun.edu/strizich/index.htmltechsci.msun.edu/strizich/index.html