Science- Unit 2 Electricity chapter 11

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Science- Unit 2 Electricity chapter 11
2014-04-03 21:03:30
electricity grade nine science glossary terms

electricity grade 9 science
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  1. Electric circuit
    a closed path along which electrons that are powered by an energy source can flow
  2. voltaic cell
    a source of energy that generates an electric current by chemical reactions involving two different metals or metal compounds separated by a solution that is a conductor
  3. battery
    a connection of two or more cells
  4. Electrode
    one of two metal terminals in a cell or battery
  5. Electrolyte
    a solution or paste that conducts charge
  6. Dry cell
    a cell that contains an electrolyte that is a paste
  7. Fuel cell
    a cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
  8. Solar cell
    a cell that converts sunlight into electrical energy
  9. terminal
    location on a cell that must be connected to other components to form a circuit
  10. Switch
    a control device that can complete or break the circuit to which it is connected
  11. Open circuit
    a circuit that contains a gap or break
  12. electric current
    the rate of movement of electric charge
  13. coulomb (C)
    the quantity of charge that is equal to the charge of 6.25 x 1018 electrons
  14. ampere (A)
    the unit of electric current, equivalent to one coulomb per second
  15. electrical resistance
    the property of a substance that hinders electric current and converts electrical energy to other forms of energy
  16. resistor
    a devic used in an electric circuit to decrease the current through a component by a specific amount
  17. circuit diagram
    a diagram that uses standard symbols to represent the components in an electric circuit and their connections
  18. series circuit
    a circuit in which there is only one path along which electrons can flow
  19. parallel circuit
    a circuit in which there is more than one path along which electrons can flow
  20. Ohm's law
    the ratio of potential difference to current is a constant called resistance
  21. ohm
    the unit for resistance equivalent to one volt per ampere (V/A)
  22. Superconductor
    a material through which electric charge can flow with no resistance
  23. non-ohmic
    not following ohm's law
  24. Load in series
    IT =  I1 +I2+ I3

    VT= V1= V2= V3

    RT= R1 + R2 +R3
  25. Load in parallel
    IT= I1=I2=I3

    VT = V1+ V2 + V3

    RT = R1+ R2+ R3