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Electric Currents

Electric Currents. Electric Currents . a path along which electrons flow must have no breaks in the path to work 2 types: closed (no breaks) open (break, causes the device to shut off - switch). 1. electronic current . Electric Currents. energy source load wires switch.

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Electric Currents

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  1. Electric Currents

  2. Electric Currents • a path along which electrons flow • must have no breaks in the path to work • 2 types: • closed (no breaks) • open (break, causes the device to shut off - switch) 1. electronic current

  3. Electric Currents • energy source • load • wires • switch 2. 4 parts of a circuit

  4. Electric Currents • pushes the electric charges through a closed circuit • battery- has a positive and a negative terminal, one side repels electrical charges and one attracts 3. energy source

  5. Electric Currents • the device the circuit delivers the energy to • examples: light bulb, bell 4. load

  6. Electric Currents • connect the energy source to the load • often copper, because it is a good conductor, wrapped in plastic insulation to keep the current from flowing to other conductors 5. wires

  7. Electric Currents • opens and closes a circuit by bringing together or separating two pieces of metal 6. switch

  8. Electric Currents • the measure of how much energy is lost when electrons go through a load • the work needed to move a charge from one point to another • measured in volts 7. potential difference

  9. Electric Currents • amount of potential difference • higher the voltage, the more energy the electrons have • measured by a voltmeter 8. voltage

  10. Electric Currents • the number of electrons per second that flow past a point in a circuit • measured with an ammeter • SI unit of measurement in the ampere or amp 9. current

  11. Electric Currents • the ability of the material to oppose the flow of electrons through it • measured in ohms Ω • thin wire= more resistance because there is less room for the electrons to travel • longer wire= more resistance 10. resistance

  12. Electric Currents • materials that allow for free and easy movement of electrons • metals are good conductors, especially copper, silver, and aluminum 11. conductors

  13. Electric Currents • materials that are NOT good at carrying current • examples: rubber, wood, glass • the charge gets stuck and doesn’t move throughout the material 12. insulators

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