Electricity Chapter 10

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  1. Electricity
    a form of energy that results from the interaction of charged particles, such as electrons or protons
  2. Static charge (static electricity)
    an electric charge that tends to stay on the surface of an object rather that flowing away quickly
  3. Charging by friction
    • a process in which objects made from different materials rub against each other producing a net static charge on each.
    • i.e. rubbing a balloon on your hair
  4. Electrostatic series
    • A list of materials that have been arranged to their ability to hold electrons.
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  5. Insulator
    • a material in which electrons can not move freely between the atoms
    • i.e. rubber, wood
  6. Conductor
    • A material in which electrons can move easily between atoms
    • i.e. copper, gold, etc.
  7. Semiconductor
    • A material in which electrons can move fairly well between atoms.
    • i.e. non-metals like silicon
  8. Ground
    an object that can supply or remove a very large amount of electrons from a charged object thus neutralizing that object.
  9. Electroscope
    • a device that us used to detect charged particles within an atom
    • i.e. Metal leaf and pith ball 
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  10. Charging by contact
    When you generate a charge on a neutral object by touching it with a charged object
  11. Laws of electric charges
    • Laws that describe how two objects interact electrically when one or both are charged
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  12. Electric field
    • A property of the space around a charged object (positively and negatively charged), where the effect can be felt by other objects
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  13. Induced charge separation
    • The movement in a substance that is caused by the electric field of a nearby object that is not in direct contact with the substance
    • i.e. charging by induction
  14. Ion
    a positively charged atom or group of atoms
  15. Lightning rod
    • A metal sphere or point that is attached to the highest part of a building and is connected to the ground.
    • Mostly in rural areas where barns are the highest buildings in miles
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  16. Electrostatic precipitator
    • A type of cleaner that removes unwanted particles and liquid droplets from a flow of gas.
    • Used with smoke stacks to reduce pollution
  17. Van de Graff generator
    • A device that accumulates very large charges
    • A rubber belt creates static charge that is collected by a collecting comb and then is kept in the metal sphere
  18. Radiation dosimeter
    • a small device that detects and measures exposure to radiation.
    • some work like film when the radiation darkens the film
    • others are like a metal leaf electroscope surrounded by a gas; the gas is non-conductive but the radiation knocks a few electrons out thus making it charged.
Card Set:
Electricity Chapter 10
2016-01-07 23:21:34
Science electrical electricity

Ms. Day Electricity Cue Cards
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