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HuckKim
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Electricity
a form of energy that results from the interaction of charged particles, such as electrons or protons
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Static charge (static electricity)
an electric charge that tends to stay on the surface of an object rather that flowing away quickly
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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
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Electrostatic series
- A list of materials that have been arranged to their ability to hold electrons.
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Insulator
- a material in which electrons can not move freely between the atoms
- i.e. rubber, wood
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Conductor
- A material in which electrons can move easily between atoms
- i.e. copper, gold, etc.
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Semiconductor
- A material in which electrons can move fairly well between atoms.
- i.e. non-metals like silicon
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Ground
an object that can supply or remove a very large amount of electrons from a charged object thus neutralizing that object.
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Electroscope
- a device that us used to detect charged particles within an atom
- i.e. Metal leaf and pith ballÂ
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Charging by contact
When you generate a charge on a neutral object by touching it with a charged object
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Laws of electric charges
- Laws that describe how two objects interact electrically when one or both are charged
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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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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
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Ion
a positively charged atom or group of atoms
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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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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
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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
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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.
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