Notes pb lab 03b the big switch
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    Notes pb lab 03b the big switch Notes pb lab 03b the big switch Presentation Transcript

    • The Big Switch
    • Key Objectives:Key Objectives:Demonstrate anunderstanding of magneticfieldsConstruct an electromagnetand explain how it works
    • Key Objectives:Key Objectives:Demonstrate anunderstanding of motors andgenerators and their uses
    • Key Objectives:Key Objectives:Explain the relationshipbetween a magnetic fieldand electric current and howthey combine to formelectromagnetic induction
    • Key TermsKey TermsElectric MotorElectric GeneratorElectromagnetElectric FieldMagnetic Field(Electromagnetic) Induction
    • Electric MotorA device thatconverts/transformselectrical energyinto mechanicalenergy
    • Electric GeneratorA device thatconverts/transformsmechanical energyinto electricalenergy
    • ElectromagnetA coil wrappedaround a soft ironcore and that actsas a magnetwhen an electriccurrent runsthrough the coil
    • Electric FieldThe space aroundan electricallycharged objectaround whichanother chargedobject experienceselectric force
    • Magnetic FieldThe area arounda magnet wherethe magneticforce can be felt It runs from endto end or from thenorth pole to thesouth pole of themagnet.
    • Electromagnetic InductionThe process inwhich a magnetpasses through acopper coilcreating anelectrical field– The generation ofelectricity
    • Lab BreakNow you can partner up and goto any station to begin yourobservationsRemember to answer eacharrow before moving onRemember to read and followall lab directions.
    • LAB BREAKBegin work on part 2Read and follow each step of the labRemember to write responses as yougo.Complete all of part 2 with your partnerYou have 20 minutes
    • Page 23 Question 2
    • Page 25 Question 2
    • Essential LearningsA current-carrying wire issurrounded by anelectromagnetic field.
    • Essential LearningsAn electromagnet isproduced when currentpasses through a wirecoiled around an iron orsteel rod
    • Essential LearningsForces of repulsion andattraction cause motionwhen magnetic fieldsinteract.
    • Essential Learnings Motors transform electricalenergy into mechanicalenergy.
    • Essential Learnings Inside the motor–Current creates twoopposing electromagnetson the armature (thecopper coil and iron partthat spins)
    • Essential LearningsInside the motor–The electromagnets on thearmature repel thestationary magnets inposition around thearmature
    • Essential Learnings Generators transformmechanical energy intoelectrical energy.
    • Essential Learnings Inside the generator–electromagnetic inductionoccurs as a copper coilpasses through a magneticfield, creating electriccurrent
    • Essential Learnings Both motors and generatorshave the same basic partsbut their operations arereverse
    • Essential Learnings Internal components ofmotors and generators– A coil of copper wire wrappedaround a soft iron core(armature)– A set of permanent magnets thatcreate a magnetic field
    • Essential Learnings The differences betweenthem is the direction of theenergy flow and the energytransformation order
    • Why “The Big Switch” ?The term “switch” refers to thechangeover from motor togenerator of what is basically thesame device.As the direction of the energytransformation “switches” thedevice’s purpose “switches”
    • From One to the Other!!!
    • A Windmill (Wind Turbine)Windmills generators transformmechanical energy to electricalenergy.Done by creating an electric fieldinside the generator (electromagnetinduction) when a copper coil passesthrough a magnetic field
    • Wind Turbine