1-电路知识回顾（1- circuit knowledge review）.doc

1-电路知识回顾（1- circuit knowledge review） This article is contributed by Wei Xiao Hu Ppt documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. Part 1: a review of circuit knowledge Speaker: Speaker: Ke Li, School of engineering, Beijing Normal University, Zuhai, Zhuhai entry exit inspection and Quarantine Bureau Technical Center Circuit knowledge review 1234 Terminology; basic theorem; component power supply art 1. description of physical quantities Current strength Charge Q, through a conductor cross section of the charge q per unit time through the conductor cross section per unit time is i=dq/dt; i=dq/dt; characterization of charge of the electric force along the conductor motion ability; characterization of charge of the electric force along the conductor movement ability; language Voltage Describe the power of an electric field to do work. Describe the power of an electric field to do work. For the electric field force, the unit positive charge moves from the a point to B Uab in any path, which is the work done by the electric field force that moves the unit positive charge along the path from a to B at any path EMF The power of a unit positive charge from the direction of power from the low potential end of the power source to the high potential end through the power source; the work done by the part moving to the high potential end; art 1. description of physical quantities The reference direction of current, current, and voltage The assumed current (or voltage) is assumed to be the direction of the current (or voltage) that is the reference direction of the physical quantity language potential The voltage at a point to a potential reference point. The potential of a reference point is 0 the voltage at a point to the reference point of the potential. The potential of the reference point is 0; electric power Describe the circuits ability to convert electrical energy to ot