Physics Grade 9

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Physics Grade 9
2013-03-30 09:23:52

Static Charges and Energy
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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 than flowing away quickly.
  3. Charging by Friction
    A process in which objects made from different materials rubbing against each other  producing a net static charge on each.
  4. Electrostatic Series
    A list of materials that have been arranged according to their ability to hold onto electrons.
  5. Insulator
    A materiel in which e- cannot move easily between atoms.
  6. Conductor
    A material in which ecan move easily between atoms.
  7. Semi-Conductor
    A material in which e- can move fairly well between atoms.
  8. Ground
    An object that can supply a very large number of electrons to, or can remove a very large number of e- from a charged object, thus neutralizing the object. 
  9. Electroscope
    A device for detecting the presence of an electric charge. 
  10. Charging by Contact
    Generating 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.
  12. Electric Field
    A property of the space around a charged object, where the effect of its charge can be felt by other objects. 
  13. Induced Charge Seperation
    The movement of electrons in a substance cause by the electric field of a nearby charged object, without direct contact between the substance and the object.
  14. Ion
    A charged atom or group of atoms.
  15. Lightning Rod
    A metal sphere or point attached to the highest part of a building and connected to the ground. 
  16. Electrostatic Precipitator
    A type of cleaner that removes unwanted particles and liquid droplets from a flow of gas. 
  17. Van de Graff Generator
    A device that accumulates very large charges.
  18. Radiation Dosimeter
    A small device that detects and measures exposure to radiation.