电子信息技术专业英语教学课件ppt作者丁宁Unit1ElectronicComponent课件.pptVIP

unit1 1.component n.元件 A computer consists of thousands of electronic components. 电脑由成千上万个电子元件组成。 2. circuit n.电路 电子信息技术专业英语 Unit 1 Electronic Components 电子元件 Part One Electronics Technical terms: electronic equipment 电子设备 electronic circuits 电子电路 electrical energy 电能 variable resistors 可调电阻 alternating currents 交流电 direct currents 直流电 non-conducting material 绝缘体 Questions for text discussion: What component can restrict the flow of electrons ? resistor What component can be used to change AC into DC? diode What componet can amplify small signal ? transistor Preparing for the text: The main idea of this unit: This unit mainly discusses the basic knowledge about different components. (1) A resistor is to restrict the flow of electrons and reduce the current or voltage flowing by converting electrical energy into heat. (2) Diodes can be used to change alternating currents into direct currents. (3) A capacitor consist of two pieces of conducting material (such as metal) separated by a non-conducting material called a dielectric. (4) Transistors can switch tiny electric currents on and off or amplify them New Words 开路（断路）open circuit短路 short circuit开路电压 open-circuit voltage短路电流 short-circuit current直流电路 direct current circuit (dc)交流电路 alternating current circuit (ac) 3. equipment n. 设备 The complete equipment of the new hospital will take a year.  把这个新医院的设备配齐要化一年时间。 4. infinite adj. 无限的 5. encounter. vt. 遇到 I encountered great difficulties in learning English grammar.  我在学习英语语法时遇到了很大困难。 6. resistor n. 电阻 7. capacitor n.电容 8. dielectric n. 绝缘体 9. separate v. 分开 The two communities are separated by a highway. 这两个社区由一条公路隔开。 10. current n. 电流 (1). n. 电流 electric current There is a current flow in the circuit. (2). adj. 当前，现在 current events 当前事 11. tran