basic current electricity notes
TRANSCRIPT
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CURRENT ELECTRICITY
The energy of moving charges
(flow of electrons)
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PERMANENT SOURCESLarge amounts of electrical power
produced by Generators. (power plants)
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TEMPORARY SOURCES - Small amounts of
electrical power produced by Cells. (batteries)
ELECTROCHEMICAL CELL - Battery that produces
energy through a chemical reaction. (disposable)
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TEMPORARY SOURCES - Continued
STORAGE CELLBattery that needs to be charged in order to
produce energy. (rechargeable)
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What is Current Electricity?
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Current Electricity: the flow of electrons along a pathway (wire) from
negative to positive.
Negative
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Circuit: (from the root word circle) A pathway for electrons that ends at the
same point it starts.
Negative
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Complete or Closed Circuit: A circuit in which electrons can flow and
complete the path from the negative to the positive terminal of the
battery.
Negative
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Incomplete or Open Circuit: A circuit in which electrons cannot
flow and therefore cannot complete the path between the negative and
positive terminals of the battery because of openings or breaks.
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Incomplete or Open Circuit
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Electrical Device: any item used in an electric circuit.
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1. Load:(L) An electrical device that uses or resists electricity.
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2. Non-Load:(NL) An electrical device that does not use electricity and does
not have any resistance.
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3. Safety Devices: (SD) a non-load electrical device that controls the
circuit.
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CONDUCTOR - any material that allows electrons to flow. (metals)
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NON-CONDUCTOR - any material that prevents electrons from
flowing (non-metals)