logging in or signing up Electricity mwarner1968 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1127 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: November 17, 2008 This Presentation is Public Favorites: 2 Presentation Description Notes for Mr. Warner's physical science class Comments Posting comment... Premium member Presentation Transcript Electricity : Electricity Parts on an atom : Parts on an atom Protons, have a positive (+) charge, found in nucleus Neutrons, have no charge, found in nucleus Electrons, have a negative (-) charge. found orbiting nucleus, electrons are electricity Slide 3: Electricity is the flow of electrons through matter Static electricity is a build up of electrons Electric current has a steady flow of electrons Slide 4: Electrons flow easily through some things, like metals,(conductors) and do not move easily through others(insulators) AC/DC : AC/DC Direct current in electricity that has the electrons traveling from negative and positive. Electrons go in one direction only. Batteries are direct current Slide 6: Alternating current has electrons that switch directions. Household current is alternating current. It is much easier to change voltage of AC, so it can travel more efficiently. Measuring Electricity : Measuring Electricity The number of electrons flowing past is the current, which we measure in Amps Voltage difference (volts) is how hard each electron is pressing, pressure, like water from a hose Slide 8: How hard the material is to travel through is the resistance, measured in Ohms Think of electricity as traffic, the current is how many cars, the voltage is how fast they are moving and the resistance is how good the road is. Slide 9: Ohms Law V=I x R Where V=Voltage I=Current R=Resistance Generating Electricity : Generating Electricity Electrons move through wire when near a magnetic field. A generator spins copper wire around a magnet or a magnet around copper wire Slide 13: To generate electricity something must turn the turbine. Clean sources Water from a river or dam can be used Wind Geothermal Slide 14: Burning sources Steam used to turn turbines from coal, gas, oil, biomass or nuclear Solar : Solar Solar panels convert sunlight into electricity directly Once built, zero emission Cost/Benefit : Cost/Benefit Cost Benefit Slide 19: Bibliography Solar panel image http://eagle.csd49.org/middle/jss/Course_SolarPanel.htm Turbine http://www.search.com/reference/Water_turbine Hydroelectric http://www.daviddarling.info/encyclopedia/H/AE_hydroelectric_power.html Generator http://www.britannica.com/eb/art-66057 Slide 20: Generator http://www.britannica.com/eb/art-66057 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Electricity mwarner1968 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1127 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: November 17, 2008 This Presentation is Public Favorites: 2 Presentation Description Notes for Mr. Warner's physical science class Comments Posting comment... Premium member Presentation Transcript Electricity : Electricity Parts on an atom : Parts on an atom Protons, have a positive (+) charge, found in nucleus Neutrons, have no charge, found in nucleus Electrons, have a negative (-) charge. found orbiting nucleus, electrons are electricity Slide 3: Electricity is the flow of electrons through matter Static electricity is a build up of electrons Electric current has a steady flow of electrons Slide 4: Electrons flow easily through some things, like metals,(conductors) and do not move easily through others(insulators) AC/DC : AC/DC Direct current in electricity that has the electrons traveling from negative and positive. Electrons go in one direction only. Batteries are direct current Slide 6: Alternating current has electrons that switch directions. Household current is alternating current. It is much easier to change voltage of AC, so it can travel more efficiently. Measuring Electricity : Measuring Electricity The number of electrons flowing past is the current, which we measure in Amps Voltage difference (volts) is how hard each electron is pressing, pressure, like water from a hose Slide 8: How hard the material is to travel through is the resistance, measured in Ohms Think of electricity as traffic, the current is how many cars, the voltage is how fast they are moving and the resistance is how good the road is. Slide 9: Ohms Law V=I x R Where V=Voltage I=Current R=Resistance Generating Electricity : Generating Electricity Electrons move through wire when near a magnetic field. A generator spins copper wire around a magnet or a magnet around copper wire Slide 13: To generate electricity something must turn the turbine. Clean sources Water from a river or dam can be used Wind Geothermal Slide 14: Burning sources Steam used to turn turbines from coal, gas, oil, biomass or nuclear Solar : Solar Solar panels convert sunlight into electricity directly Once built, zero emission Cost/Benefit : Cost/Benefit Cost Benefit Slide 19: Bibliography Solar panel image http://eagle.csd49.org/middle/jss/Course_SolarPanel.htm Turbine http://www.search.com/reference/Water_turbine Hydroelectric http://www.daviddarling.info/encyclopedia/H/AE_hydroelectric_power.html Generator http://www.britannica.com/eb/art-66057 Slide 20: Generator http://www.britannica.com/eb/art-66057