【資料名稱】：Basic_Circuit_Theory(基本電路理論-英文版)

【資料作者】：aa

【資料日期】：2001-10-19

【資料語言】：英文

【資料格式】：DOC

【資料目錄和簡介】：

Electron: an indivisible particle of negative charge. The amount of charge is measured in coulombs (C). The magnitude of the charge associated with an electron is 1.602x10-l9 C.
Current: charge in motion (electrons). Current is measured in units of amperes, or more simply amp.
Voltage: an electric potential difference that causes electron flow. It is also called electromotive force (EMF). An analogy often used to describe current and voltage is water in a pipe. Current is analogous to the flow of water, while voltage is analogous to the pressure.
Conductor: a material that allows a continuous current to pass through it under the action of a fixed voltage. An example of a good conductor is copper or aluminum which is used in homes and offices for all electrical connections.
Insulator: the opposite of a conductor, it does not allow a continuous current to pass though it under the action of a fixed voltage. An example of an insulator is the plastic on electrical cords. Using our water analogy, a conductor can be envisioned as the region inside a pipe, while an insulator can be envisioned as the actual material of the pipe which contains the water flow.
Switch: used to control the flow of electrons, or current as it is commonly called. Ideally, a switch turns on or off instantly, and has no voltage across it while it is conducting. In our water analogy, an ideal switch would cut the flow immediately, from completely on to completely off in an instant.