Electricity Chapter 11

  1. Electric circuit
    • a closed path which electrons that are powered by an energy source can flow.
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  2. Voltaic cell
    • a source of energy that generates current by chemical reactions involving two different metals or metal compounds by separated by a conducting solution.
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  3. Battery
    • a connection of two or more cells
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  4. Electrode
    one of two metal terminals in a cell or battery
  5. Electrolyte
    • a solution or paste that conducts charge
    • i.e dry cells have a paste electrolyte
  6. Dry cell
    • A cell that contains an electrolyte made out of paste
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  7. Wet cell
    • a cell that contains a liquid electrolyte
    • i.e. car battery
  8. Primary cell
    • a cell that can only be used once
    • i.e. AAA battery, AA battery
  9. Secondary cell
    • A cell that can be recharged
    • i.e. car batteries, rechargeable batteries
  10. Fuel cell
    a cell that generates electricity through chemical reactions that is stored outside the cell
  11. Solar cell
    • a cell that converts sunlight into electrical energy
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  12. Terminal
    a position on a cell that must be connected to other components to form a circuit
  13. Switch
    • a control device that  can complete a circuit to which it is connected
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  14. Open circuit
    • a circuit that contains a gap or break
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  15. Electric current
    A measure of the number of charged particles that pass a point in an electric fieldMeasured by an ammeterUnit is Amperes or Amps
  16. Coulomb (C)
    the quantity of charge that is equal to the charge of 6.25 x 10^18
  17. Ampere (A)
    • It is the unit of electric current 
    • equivalent to 1 coulomb per second
  18. Electrical resistance
    • The property if a substance that hinders electric current and converts electrical energy to other forms of energy
    • i.e incandescent light bulbs have a lot of heat out because of resistance.
  19. Resistor
    a device used in an electric circuit to decrease the current through a component by a specific amount.
  20. Load
    • a resistor or any device that transforms electrical energy into heat, motion, sound, or light.
    • i.e. a light bulb would be a load that transforms electrical energy to light and heat energy.
  21. Potential difference (voltage)
    The difference between the electric potential energy per unit of charge at two points on a circuit
  22. Volt
    the unit for potential difference equivalent to one joule per coulomb.
  23. Circuit diagram
    • a diagram that uses standard symbols that represent the components in an electric circuit and their connections
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  24. Series circuit
    • a circuit in which there is only one path along which electrons can flow.
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  25. Parallel circuit
    • a circuit in which there is more that one path along which electrons can flow
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  26. Ohm’s law
    • The ratio of potential difference to current is a constant called resistance.
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  27. Ohm (Ω)
    the unit for resistance and is equivalent to one volt per ampere (v/a)
  28. Superconductor
    a conductor in which electrical charge can flow with no resistance
  29. Non-ohmic
    Something that doesn't follow ohm's law
  30. Loads in Series
  31. Loads in Parallel
Card Set
Electricity Chapter 11
Ms. Day's Gr.9 science class cue cards