Electricity Chapter 11

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Electricity Chapter 11
2013-10-24 23:40:30

Chapter 11 Glossary Terms
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  1. Electric circuit
    A closed path along which electrons that are powered by an energy source can flow.

    eg. battery, generator, motor
  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 2 or more cells

    1 cell = 1.5 V

  4. Electrode
    One of two metal terminals in a cell
  5. Electrolyte
    a liquid or gel which contains ions and can be decomposed by electrolysis, e.g. that present in a battery.

  6. Dry cell
    an electric cell in which the electrolyte is absorbed in a solid to form a paste, preventing spillage.

  7. Wet cell
    a primary electric cell in which the electrolyte is a liquid.

  8. Primary cell
    an electric cell that produces current by an irreversible chemical reaction.
  9. Secondary cell
    storage cell; a cell that can be recharged

  10. Fuel cell
    a cell producing an electric current direct from a chemical reaction.

  11. Solar cell
    a device converting solar radiation into electricity.
  12. Terminal
    a point of connection for closing an electric circuit.
  13. Switch
    a device for making and breaking the connection in an electric circuit.

  14. Open circuit
    consisting of or containing an open electric circuit.

  15. Electric current
    a flow of electricity through a conductor
  16. Coulomb
    the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere.
  17. Ampere
    a unit of electric current equal to a flow of one coulomb per second.

  18. Electrical resistance
    a material's opposition to the flow of electric current; measured in ohms
  19. Resistor
    a device having resistance to the passage of an electric current.
  20. Load
    A device or the resistance of a device to which power is delivered.

  21. Potential difference (voltage)
    the difference of electrical potential between two points.
  22. Volt
    the unit for potential difference equivalent to one joule

  23. Circuit diagram
    a simplified conventional graphical representation of an electrical circuit.

  24. Series circuit
    a circuit having its parts connected serially

  25. Parallel circuit
    a closed circuit in which the current divides into two or more paths before recombining to complete the circuit

  26. Ohm’s law
    a law stating that electric current is proportional to voltage and inversely proportional to resistance.

  27. Ohm ()
    the SI unit of electrical resistance, transmitting a current of one ampere when subjected to a potential difference of one volt.

  28. Superconductor
    A conductor with no electrical resistance

    e.g. Mercury

  29. Non-ohmic
    resistors have changing ratios, and are defined by their instantaneous resistance

  30. Loads in Series
    Loads that are in a series connection
  31. Loads in Parallel
    Loads that are in a parallel connection