电子信息专业英语Unit 1.ppt

电子信息专业英语Unit 1 Elements and Laws Contents Text Text Text Text Text Text Text Text Text Text Text Text Text Text Knowledge about Translation Knowledge about Translation Knowledge about Translation Knowledge about Translation Knowledge about Translation Classroom Reading Classroom Reading Classroom Reading Classroom Reading Classroom Reading Company Logo * LOGO 大连理工大学出版社 Text A Knowledge about Translation B Classroom Reading C Resistors, Capacitors and Inductors Resistors, capacitors and inductors are very important elements in electronic circuits. Resistors and Resistance A resistor is a two-terminal element. Resistance is the capacity of materials to impede the flow of current or, more specifically, the flow of electric charge. 电阻器、电容器和电感器 在电子电路中，电阻器、电容器和电感器是非常重要的元件。 电阻器和电阻 电阻器是二端口元件。电阻是阻止电流流动，更确切地说，是阻止电荷流动的能力。 T N resistor  n. [电] 电阻器 capacitor n. (=capacitator) 电容器 inductor  n. 电感器 element n. 元件 electronic a. 电子的 circuit n. 电路 resistance n. 电阻，阻抗 terminal n. 终端 capacity  n. 容量 impede v. 阻止 current  n. 电流 charge n. 负荷，电荷，充电 In SI, resistance is measured in ohms. The Greek letter omega (Ω) is the standard symbol for an ohm. Larger amount of resistance are commonly expressed in kilo-ohm (kΩ) and in mega-ohm (MΩ). 在国际单位制中，电阻用欧姆来度量。希腊字母Ω是欧姆的标准符号。较大的电阻一般用千欧和兆欧来表示。 T N SI 国际单位制,英文:International System of Units ohm  n. [物] 欧姆 The circuit element used to model this behavior is the resistor. Figure 1.1 shows the circuit symbol for the resistor, with R denoting the resistance value of the resistor. Figure 1.1 The circuit symbol for a resistor 模拟这种特性常用的电路元件是电阻器。图1.1表示电阻器的电路符号，R表示电阻器的电阻值。 图 1.1 电阻器的电路符号 T For purposes of circuit analysis, we must reference the current in the resistor to the terminal voltage. If we choose the associated reference direction, the relationship between the voltage and current is v = iR  (1.1) Where v is the voltage in volts,