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