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.
    • E.g. Lightning
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  2. Static Charge (Static Electricity)
    • An electric charge that tends to stay on the surface of an object, rather than flowing away quickly.
    • E.g. The effect of rubbing a balloon onto your hair.
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  3. Charging By Friction
    • A process in which objects made from different materials rub against each other, producing a net static charge on each.
    • E.g. Rubbing wool socks on a carpet.
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  4. Electrostatic Series
    • A list if materials that have been arranged according to their ability to hold on to electrons.
    • E.g. Refer to ON SCIENCE 9, pg 405,  table 10.1.
  5. Insulator
    • A material in which electrons cannot move easily from one atom to another.
    • E.g. Rubber, glass, wood, pure water
  6. Conductor
    • A material in which electrons can move easily between atoms.
    • E.g. Copper, Brass, Silver, Steel
  7. Semiconductor
    • A material in which electrons can move fairly well between atoms.
    • E.g. Silicon, Germanium, Sulfur, Zinc Oxide
  8. Ground
    • An object that can supply a very large number of electrons to, or can remove a very large number electrons from, a charged object, thus neutralizing the object.
    • E.g. Earth
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  9. Electroscope
    • A device for detecting the presence of an electric charge.
    • E.g. Pith ball electroscope, metal leaf electroscope
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  10. Charging By Contact
    • Generating a charge on a neutral object by touching it with a charged object.
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  11. Laws Of Electric Charges
    • Laws that describe how two objects interact electrically when one or both are charged.
    • E.g. <-- -ve   -ve -->  and <-- +ve  +ve -->
    • +ve --> <-- -ve
    • +ve --> <-- n  and  -ve --> <--n
  12. Electric Field
    • A property of the space around a charged object, where the effect of its charge can be felt by other objects.
    • E.g. Positively charged objects repel other positives and negatively charged objects attract positives
  13. Induced Charge Separation
    • The movements of electrons in a substance, caused by the electric field of a nearby charged object, without the direct contact between the substance and the object.
    • E.g. When a charged piece of wool is brought near a pith ball electroscope.
  14. Ion
    A charged atom or group of atoms.
  15. Lightning Rod
    • A metal sphere or point, attached to the highest part of the building and connected to the ground.
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  16. Electrostatic Precipitator
    • A type of cleaner that removes unwanted particles and liquid droplets from a flow of gas.
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  17. Van de Graaff Generator
    • A device that accumulates very large charges.
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  18. Radiation Dosimeter
    • A small device that detects and measures exposure to radiation.
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Card Set:
Electricity Chapter 10
2013-10-15 11:35:00

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