Current, Voltage, & Resistance

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An overview of electric charges, current, voltage, and resistance- with a little bit of Ohm's Law.

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Current, Voltage, & Resistance

  1. 1. Electric Charges& CircuitsSome rights reserved by reutC
  2. 2. Remember:Electric charges come intwo varieties. Negative & Positive
  3. 3. Opposite charges attract.
  4. 4. Like charges repel.
  5. 5. Like charges repel.
  6. 6. How do we describeelectricity?Voltage The difference in electric potential between 2 points. or How much the electric charges want to move.
  7. 7. Some  rights  reserved  by  Elfo  Tógrafo  High Voltage
  8. 8. Some  rights  reserved  by  Elfo  Tógrafo  Low Voltage
  9. 9. Some  rights  reserved  by  Elfo  Tógrafo  Zero Voltage
  10. 10. How do we describeelectricity?Voltage is measured in Volts (V). Some rights reserved by crows to burnaby
  11. 11. The symbol for Voltage is: V
  12. 12. How do we describeelectricity? Current How much electricity is flowing
  13. 13. Some  rights  reserved  by  Elfo  Tógrafo  High Current
  14. 14. Some  rights  reserved  by  Elfo  Tógrafo  Low Current
  15. 15. The symbol for Current is: I
  16. 16. Currentis measured in Ampères (Amps)
  17. 17. How do we describeelectricity?Resistance How difficult it is for electricity to move through a material.
  18. 18. Low Resistance High ResistanceElectric fence, via Wikimedia Commons: http://commons.wikimedia.org/wiki/File:XN_Electrical_insulation_Electric_fence_00.jpg
  19. 19. The symbol forResistance is: R
  20. 20. Resistanceis measured in Ohms (Ω)
  21. 21. Ohm’s LawV=IR Watch:http://www.youtube.com/watch?v=-mHLvtGjum4

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