UniServe Science

Physics Table of Contents


9.3 Motors and Generators


Conductors in Magnetic Fields

Generating Voltage

Use of Generators and Power

Transformers

Converting Energy With Motors

Power Lines

Sources of information for this module

9.3 MOTORS & GENERATORS - course notes from the Purplish Hue web site, St Francis Xavier's College, Hamilton, NSW
http://members.optusnet.com.au/~emeryrg/9_3_motors_&_generators.htm

Electric motors and generators - from HSC Physics, UNSW
http://www.phys.unsw.edu.au/%7Ejw/HSCmotors.html

Cool Experiments with Magnets - from the Magnet Man
http://my.execpc.com/~rhoadley/magindex.htm

Kickstart Science PHYSICS - Student Lab experiences at University of Sydney
http://www.physics.usyd.edu.au/kickstart.html

Motors and Generators - from HSC Online
http://hsc.csu.edu.au/physics/core/motors/


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Conductors in Magnetic Fields

9.3.1 - HSC Online, Department of Education and Charles Sturt University
http://hsc.csu.edu.au/physics/core/motors/2578/phy931.html

Magnetic Force Applications - Summary with good diagram, from HyperPhysics, Georgia State University
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magforcon.html#c1

Electric current and magnetic field - from Plus2 Physics - Study guide
http://www.plus2physics.com/ecurrent_and_mgfield/study_material.asp?chapter=2&page=2

CURRENT ELECTRICITY AND MAGNETISM - Summary with good diagrams, study guide
http://www.physchem.co.za/Current%20Electricity/Current.htm#Magnetic%20field

Force on a current-carrying conductor - from Texas Christian University - Laboratory Worksheet in pdf
http://personal.tcu.edu/%7Ezerda/manual/lab4.pdf

Force between parallel current-carrying conductors - from University of Pennsylvania - includes picture of current balance
http://www.physics.upenn.edu/~uglabs/exp68_doc.pdf

Force between parallel current-carrying conductors - from University of Southern California- demonstrations
http://physics.usc.edu/demolab/em/em4/contents.html

The Electric Motor - first of four pages from School Science, UK
http://www.schoolscience.co.uk/content/4/physics/copper/index.html

The DC Electric Motor - Interactive image, from HyperPhysics, Georgia State University
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/motdc.html

How Electric Motors Work - from How Stuff Works
http://www.howstuffworks.com/motor.htm

Make a galvanometer - from Center for Technology in Learning, SRI International
http://pals.sri.com/pals/tasks/5-8/Morepower/directs.html

Current Detector (Galvanometer) - instruction to make a galvanometer from Arizona State University
http://www.eas.asu.edu/~holbert/wise/galvanometer.htm

The History of Loudspeakers - Speakers - from About.com
http://inventors.about.com/library/inventors/blloudspeaker.htm

How Speakers Work - from How Stuff Works
http://entertainment.howstuffworks.com/speaker2.htm


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For background teachers may wish to research the Edison/Westinghouse debate

Lightbulbs: Edison didn't invent them, and what it means to be "Westinghoused" - from a site called "Useless information", interesting enough and probably OK, but they don't give references or justification for their information
http://home.nycap.rr.com/useless/lightbulbs/

Edison's Miracle of light - transcript - a tele-movie shown on PBS Online
http://www.pbs.org/wgbh/amex/edison/filmmore/transcript/

Edison: The Wizard of Light - movie details from Internet Movie Data Base
http://us.imdb.com/Title?0205902

Edison National Historic Site - official site, everything you would ever want to know about Edison
http://www.nps.gov/edis/home.htm

George Westinghouse - a short precis of information, also pages on Nikola Tesla, Benjamin Franklin, Bell's Telephone, and Faraday
http://users.telerama.com/~rs7717/george.html


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Generating Voltage

Faraday's Magnetic Field Induction Experiment - A Java applet from Molecular Expressions, Florida State University
http://micro.magnet.fsu.edu/electromag/java/faraday/

Magnetic field strength - A definition from Whatis?
http://whatis.techtarget.com/definition/0%2C%2Csid9_gci763586%2C00.html

Electromagnetic Induction - from Molecular expressions- Java applet for Lenz's Law
http://micro.magnet.fsu.edu/electromag/java/lenzlaw/

Generators and Motors - from Molecular Expressions
http://micro.magnet.fsu.edu/electromag/electricity/generators/index.html/

Faraday's Law - summary from HyperPhysics, Georgia State University
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html


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Applications

Induction Cooktops

Induction Cooktops - from Choice Australia
http://www.choice.com.au/viewArticle.aspx?id=103867&catId=100168&tid=100008&p=1

The Induction Cooktop - from Michigan Technological University
http://www.ece.mtu.edu/~mtromble/induction/cooktops.html

How Things Work: Magnetic Induction Cooktops - from The Tartan Online, Carnegie Mellon's Student Newspaper
http://www.thetartan.org/2006/2/27/scitech/howthingswork

Electromagnetic Braking

Eddy Currents - Lesson Outline - with multimedia resources from Australian Multimedia for Physics Students, The University of Sydney
http://www.hscphysics.edu.au/resource/Eddy%20Currents.pdf

Eddy Currents & Jumping Rings - Lesson Outline - with multimedia resources from Australian Multimedia for Physics Students, The University of Sydney
http://www.hscphysics.edu.au/resource/Eddy%20Currents%202.pdf

Eddy current Braking - from UNSW Physics FAQ
http://www.phys.unsw.edu.au/~jw/FAQ.html#eddy

Eddy current Braking Experiment - from UNSW Physics Experiments - see page four
http://www.phys.unsw.edu.au/~jw/I&Iexperiments.pdf


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Use of Generators and Power

Electrodynamics Java Applets

Walter Fendt's Applets

Direct Current Electric Motor

http://www.walter-fendt.de/ph11e/electricmotor.htm
Mirrored at
http://www.geocities.com/CapeCanaveral/Hall/6645/electmag/electricmotor.htm

Generator

http://www.walter-fendt.de/ph11e/generator_e.htm

Lorentz Force
http://www.walter-fendt.de/ph11e/lorentzforce.htm

AC Generator - from Molecular Expressions
http://micro.magnet.fsu.edu/electromag/java/generator/ac.html

Molecular Expressions - collection of Java Applets
http://micro.magnet.fsu.edu/electromag/java/

HEALTH RISKS

Power Lines and Cancer FAQs - from Medical College of Wisconsin
http://www.mcw.edu/gcrc/cop/powerlines-cancer-FAQ/toc.html

Power Lines and Cancer: Nothing to Fear - from Quackwatch, written by a Physicist
http://www.quackwatch.org/01QuackeryRelatedTopics/emf.html

Power Lines and Cancer - transcript from a The Health Report, ABC Radio National
http://www.abc.net.au/rn/talks/8.30/helthrpt/stories/s175.htm

Electromagnetic fields and health issues - from Better Health Channel, Victorian Government
http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Electromagnetic_radiation_and_health_issues?open

Association Of Health Problems with 50-hz Magnetic Fields in Human Adults Living Near Power Transmission Lines - a paper in Australasian College of Nutritional and Environmental Medicine journal
http://www.acnem.org/journal/20-2_august_2001/health_problems_of_power_lines.htm


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Transformers

Power transformers - article About Power Transformers, from GlobalSpec, Engineering Search Engine
http://electronic-components.globalspec.com/LearnMore/Electrical_Electronic_Components/Transformers/Power_Transformers

How a Transformer Works - Applet from Molecular Expressions
http://micro.magnet.fsu.edu/electromag/java/transformer/index.html

Eddy Currents - Course Notes on Electromagnetic Induction- Go to page 9 in this .pdf document
http://www.phy.uct.ac.za/courses/phy110w/mag03.pdf

Electricity Distribution - from ACTEWAGL
http://www.actewagl.com.au/education/electricity/distribution.aspx

History of Electricity - from Scholtz Electrical Company - with a Queensland flavour
http://www.scholzelectrical.com.au/electricity.htm


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Converting Energy with Motors

The Electric Motor - first of four pages, from School Science, UK
http://www.schoolscience.co.uk/content/4/physics/copper/index.html

AC Electric Motors - from UNSW
http://www.phys.unsw.edu.au/~jw/HSCmotors.html#ACmotors

AC Electric Motors - from Bob Emery
http://webs.mn.catholic.edu.au/physics/emery/hsc_motors.htm#AC%20motor

Small AC Electric Motors - PowerPoint Presentation - from Ohio University
http://www.ent.ohiou.edu/~manhire/basic_ee/chapter16/sld003.htm

Three phase AC Electric Motor - Java Applet
http://www.rawbw.com/~xmwang/javappl/acMotor1.html

Experiments With Motors - many experiments from the Magnet Man site, scroll down to motors
http://my.execpc.com/~rhoadley/maggen.htm

Western Electric - Electric Motors - from Western Electric with tutorials on various items in the course
http://www.westernelectric.com.au/

How Electric Motors Work - from How Stuff Works
http://www.howstuffworks.com/motor.htm

Basic DC motors you can build

Beakman's Electric Motor - a simple DC motor using one battery
http://fly.hiwaay.net/~palmer/motor.html

Exploratorium Snack: Stripped Down Motor - from Exploratorium
http://www.exploratorium.edu/snacks/stripped_down_motor.html

Simple Electric Motors - from a 10th grader at Clark High School in Plano, Texas, in 1997-1998 he designed a new type of simple inexpensive brushless motor for his school science fair,a very clever design of a DC motor with a permanent magnet armature
http://www.simplemotor.com/

Environment, Energy, and Electric Vehicles - a look at the near future with travel in Electric vehicles (EVs)
http://regen.0catch.com/humpwr.htm


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Power Lines

Transgrid - TransGrid is the owner, operator and manager of the high voltage electricity transmission system throughout New South Wales
http://www.transgrid.com.au/

High voltage lines - images
http://members.lycos.nl/aberkers/main.html

How Power Grids Work - from How Stuff Works
hhttp://www.howstuffworks.com/power.htm

ENERGY Australia - Our Network, from Energy Australia
http://www.energy.com.au/energy/ea.nsf/Content/Network+Home

Environment and Community - Transgrid Policy Page
http://www.transgrid.com.au/Environment_and_Community.htm

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