Electricity Chapter 10

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Maya_Fox
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285125
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Electricity Chapter 10
Updated:
2014-10-13 13:37:24
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Electricity
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Electricity Glossary Terms
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  1. Electricty
    A form of energy that results from the interactions of charged particles such as electrons and protons.
  2. Static Charge
    Electric charge that remains static (doesn't move)/builds up.
  3. Charging by Friction
    • Involves the transfer of electric charges by rubbing/friction.
    • E.g. socks on carpet or combing hair
  4. Electric Series
    • Used to determine the kind of electric charge produces on each substance when two substances are rubbed together.
    • Refer to page 405 of the textbook for the table.
    • Substances high on the table lose electrons and are positively charged.
    • Substances low on the table hold onto electrons and are negatively charged.
    • The closer two substances are on the table the weaker the ability to transfer electrons will be.
  5. Insulator
    • A material in which particles cannot move freely between atoms.
    • Wood, rubber, PURE water.
  6. Conductor
    • A material in which particle can move freely between atoms.
    • Metals (copper, aluminium), NOT PURE (with dissolved minerals) water.
  7. Semiconductor
    • A material in which particles can move with some degree of freeness between atoms.
    • Silicon.
  8. Ground
    • Ground has a very large number of charges.
    • Can make a charged object neutral by supplying or removing electrons.
    • Ground always remain neutral due to the number of electrons
  9. Electroscope
    • A device that detects the presence of an electrical charge.
    • Pith ball electroscope
    • Metal leaf electroscope
  10. Charging by Contact
    • Generating a charge on a neutral object by touching it with a charged object.
    • An object that gets charged by contact always gets the same charge as the object that charged it.
    • Positively charged objects will turn a neutral object positive.
    • The most that can happen to the first object is that it can turn neutral but that is unlikely.
    • Examples in notes if needed
  11. Law of Electric Charges
    • Laws that describe how to objects interact electrically.
    • Also, a neutral object will attracted to a charged object.
  12. Electric Field
    • The property of the space around a charged object,where the effect of its charge can be felt by other objects.
    • An electric field produces an electric force on any other objects that are in the field.Objects with greater net charges have stronger electric fields.
    • The greater the distance from the charged object the weaker the electric field on the object is.
  13. Induces Charge Separation
    The movement of electrons in a substance caused by the electric field of a nearby charge object, without direct contact between the substance and the object.
  14. Ion
    A positivity or negatively charged atom or group of atoms.
  15. Lightning Rod
    A metal sphere or point that is attached to the highest part of the building and is connected to the ground.
  16. Electrostatic Precipitator
    A type of cleaner that removes all the unwanted particles and liquid droplets from a flow of gas.
  17. Van de Graaff Generator
    A devices that accumulates very large charges.
  18. Radiation Dosimeter
    A small device that measures and detects exposure to radiation.

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