Wednesday, September 8, 2010

notes on chapter 16 - p.544~552

-Circuit is an electrical device that provides a path for electrical current to flow

-Any power supply gas current flow which moves from the positive terminal(RED) to the negative trminal(BLACK)

-The power supply supplies a centain amount of electrical pontential energy

-Electric current involes electrons repelling one anthor and passing through a conductor

-The symbol "I", represents the rate of charge flow

-The energy delivered to the load depends on the potential and the current

-If the path is more difucult, there will be more opposition to flow

-Electrical resistance is a material's opposition to the flow of electric current and it's measured in Ohms

-There are more useful when the static state electrons are made to transfer energy

- The currennt flows in a single direction from the power supply through the donductor to a load is called DC(Direct Current)

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