Voltage, Current, and Circuits

25
 1  ENGI 128 INTRODUCTION TO ENGINEERING SYSTEMS Lecture 6: Voltage, Current, and Circuits “Understand Your Technical World”

description

Voltage, Current, and CircuitsVoltage, Current, and Circuits

Transcript of Voltage, Current, and Circuits

  • 1ENGI128INTRODUCTIONTOENGINEERINGSYSTEMS

    Lecture6:Voltage,Current,andCircuits

    UnderstandYourTechnicalWorld

  • 2WelcometoElectricalEngineering!

    Wewillstartourstudyofelectricalengineeringwithitstwomostbasicconcepts:voltageandcurrent.

    Wellintroducethemostpopularelementinelectricity,theresistor

    Wellthenmovetothesimplestpossiblecircuit,thevoltagedivider.

    Finally,wellgooversomemeasurementtechniquesthatyouwillneednextweek.

  • 3Voltage&Current

  • 4Well,whatarethey?

    Voltage=Electricalpotentialenergy(theabilitytodowork)

    Current=Flowofelectricity(workbeingdone)

  • 5Voltagefunfacts: Voltageisthedifference inelectricalpotentialenergy Therefore,voltagemustbemeasuredbetweentwopoints Everysystemhassomereferencevoltagethatwedefineas0.Thisisalsocalledground.

    Allothervoltagesaremeasuredrelativetoground

  • 6Currentfunfacts: Currentonlyflowsfromhighvoltagetolowvoltage Currentrequiresavoltage,butnottheotherwayaround Currentcannotleaveacircuit,itmustbeconserved

  • 7[currentandvoltagedemo]

  • 8Howdoyougettheelectronsoffoftheground?

    Currentcantflowwithoutawaytogetbackhome Youhavetoaddenergytotheelectronstoincreasetheirvoltage

    Thiscreatesacircuit Alltheelectricitywewilllookatandtalkaboutisinacircuit Acircuitisaclosedsystemofelectrons:

    Thismeansthatweneverloseanyelectrons Thismeansthatyoucantpushelectronsdownaopenendedwire Thereneedstobeapathtogetbacktohome Ifyouwantthecircuittorunmorethanonce,youneedtogetvoltagebackintotheelectrons

  • 9PowerSupplies

  • 10

    Wheredowegetvoltageandcurrentfrom?

    Batteries

    Whatelse?

  • 11

    Whyallthebatteries?

    Butwhydoeseverythingusemorethanonebattery?

    a.Tohavemoreenergy

    b.Tohavemorevoltage

    c.Tohavemorecurrent

  • 12

    AddingVoltage:Multiplebatteries

    Puttingbatteriesinseries:

    Puttingbatteriesinparallel:

  • 13

    Resistors

  • 14

    Resistors

    Resistorsimpedetheflowofcurrent

    Sowhyintheworldwouldyoueverusethem? Becauseascurrentflowsthroughthem,itcreatesavoltagedropacrosstheresistor

    Thischangeinvoltagecanbeuseful.

    Andthisbringsustoouronlyequationinthismodule,Ohmslaw: voltage=current resistance V=IR

  • 15

    readingresistors:colorcodes

  • 16

    Schematics

  • 17

    SchematicSymbols

  • 18

    ASchematicDiagram:TheVoltageDivider

    Singlemostusefulcircuitontheplanet:

  • 19

    TheVoltageDivider

  • 20

    [showroneschematicshighlightresistors&voltagedividers]

  • 21

    VoltageDividerMathOhmsLaw

    Conservationofcurrent

    Kirchhoffsvoltagelaw

  • 22

    [showroneschematicsandhighlightvoltagedividers]

  • 23

    TakingElectricalMeasurements

  • 24

    TheMultimeter

    OK,alltogethernow: Measuringvoltage Measuringresistance

  • 25

    [multimeter examples]


EE292: Fundamentals of ECEb1morris/cpe260/docs/slides20.pdf · RC and LR circuits •The general solution for current/voltage is: – represents current or voltage 𝑡0− represents

EE292: Fundamentals of ECEb1morris/cpe260/docs/slides20.pdf · RC and LR circuits •The general solution for current/voltage is: – represents current or voltage 𝑡0− represents

L/O :- To understand how current and voltage behave in a series circuit ‘Current and voltage in series circuits’

L/O :- To understand how current and voltage behave in a series circuit ‘Current and voltage in series circuits’

Exercise: Voltage, Current, and Ohm’s Law / DC Power Circuits

Exercise: Voltage, Current, and Ohm’s Law / DC Power Circuits

AN92 - Bias Voltage and Current Sense Circuits for ...cds.linear.com/docs/en/application-note/an92f.pdf · Bias Voltage and Current Sense Circuits for Avalanche Photodiodes ... “high

AN92 - Bias Voltage and Current Sense Circuits for ...cds.linear.com/docs/en/application-note/an92f.pdf · Bias Voltage and Current Sense Circuits for Avalanche Photodiodes ... “high

Electric Circuits Part Two: Current and Voltage Learning Goals Explain how current flows in an electric circuit. Define voltage and describe how.

Electric Circuits Part Two: Current and Voltage Learning Goals Explain how current flows in an electric circuit. Define voltage and describe how.

DEPARTMENT OF ELECTRONIC ENGINEERING...EE-120 Basic Electrical Engineering . Fundamentals of Electric Circuits: Charge, Current, Voltage and Power, Voltage and Current Sources, Ohm’s

DEPARTMENT OF ELECTRONIC ENGINEERING...EE-120 Basic Electrical Engineering . Fundamentals of Electric Circuits: Charge, Current, Voltage and Power, Voltage and Current Sources, Ohm’s

Current mode circuits & voltage mode circuits

Current mode circuits & voltage mode circuits

Voltage divider circuits - ibiblio · Voltage divider circuits ... Although the amount of current necessary to smelt aluminum in this manner is huge, the voltage drop across each

Voltage divider circuits - ibiblio · Voltage divider circuits ... Although the amount of current necessary to smelt aluminum in this manner is huge, the voltage drop across each

EC8353 Electron Devices and Circuits UNIT V FEEDBACK ... · Shunt-Shunt Feedback Amplifier (Voltage-Current Feedback • When voltage-current FB is applied to a transimpedance amplifier,

EC8353 Electron Devices and Circuits UNIT V FEEDBACK ... · Shunt-Shunt Feedback Amplifier (Voltage-Current Feedback • When voltage-current FB is applied to a transimpedance amplifier,

Circuits, Current and Voltage 1.Series Circuits 2.Parallel Circuits 3.Measuring Current 4.Measuring Voltage 5.Determining Current and Voltage using circuit.

Circuits, Current and Voltage 1.Series Circuits 2.Parallel Circuits 3.Measuring Current 4.Measuring Voltage 5.Determining Current and Voltage using circuit.

Course Title/Code BASIC ELECTRICAL …...DC Circuits Electrical circuit elements (R, L and C), voltage and current sources, Network reduction: voltage and current division, source

Course Title/Code BASIC ELECTRICAL …...DC Circuits Electrical circuit elements (R, L and C), voltage and current sources, Network reduction: voltage and current division, source

Circuits Current, Voltage and Resistance 1 TOP Current Batteries Basic Circuit Elements Resistors.

Circuits Current, Voltage and Resistance 1 TOP Current Batteries Basic Circuit Elements Resistors.

Alternating Current Circuits. AC Sources : angular frequency of AC voltage V max : the maximum output voltage of AC source.

Alternating Current Circuits. AC Sources : angular frequency of AC voltage V max : the maximum output voltage of AC source.

Unit 7: Electric Current & Circuits Electric current is related to voltage that produces it, and resistance that opposes it.

Unit 7: Electric Current & Circuits Electric current is related to voltage that produces it, and resistance that opposes it.

ELECTRIC CIRCUITS. Chapter Twenty: Electric Circuits 20.1 Charge 20.2 Electric Circuits 20.3 Current and Voltage 20.4 Resistance and Ohm’s Law.

ELECTRIC CIRCUITS. Chapter Twenty: Electric Circuits 20.1 Charge 20.2 Electric Circuits 20.3 Current and Voltage 20.4 Resistance and Ohm’s Law.

AN92 - Bias Voltage and Current Sense Circuits for ...€¦ · Application Note 92 AN92-2 The bias voltage and current measurement requirements described above constitute a significant

AN92 - Bias Voltage and Current Sense Circuits for ...€¦ · Application Note 92 AN92-2 The bias voltage and current measurement requirements described above constitute a significant

Electrical Circuits Targeted Skills for Circuits 1.Define: voltage, current, resistance, power, and Ohm's Law. 2. Qualitatively analyze series, parallel.

Electrical Circuits Targeted Skills for Circuits 1.Define: voltage, current, resistance, power, and Ohm's Law. 2. Qualitatively analyze series, parallel.

2. Charge, Current, Voltage, Electrical Circuits · M. Horowitz, J. Plummer, R. Howe 19 Learning Objectives – Charge, Current, Voltage, Electrical Circuits • Understand that charge

2. Charge, Current, Voltage, Electrical Circuits · M. Horowitz, J. Plummer, R. Howe 19 Learning Objectives – Charge, Current, Voltage, Electrical Circuits • Understand that charge

Impulse Voltage/Current Generator - Samgor series_11.pdf · Impulse Voltage/Current Generator ... Unique DC high frequency 20kHz charging device ... Additional circuits for transformer

Impulse Voltage/Current Generator - Samgor series_11.pdf · Impulse Voltage/Current Generator ... Unique DC high frequency 20kHz charging device ... Additional circuits for transformer

Divider Circuits and Kirchoff’s Laws. 9/6/2015D.N2 Divider Circuits and Kirchoff’s Laws Voltage divider circuits Kirchhoff's Voltage Law (KVL) Current.

Divider Circuits and Kirchoff’s Laws. 9/6/2015D.N2 Divider Circuits and Kirchoff’s Laws Voltage divider circuits Kirchhoff's Voltage Law (KVL) Current.