ResistorA resistor is a two-terminal electronic component that opposes an electric current by producing a voltage drop between its terminals in proportion to the current ， that is ,in accordance with Ohm’s law ：V=IR .The electrical resistance R is equal to the voltage drop V across the resistor divided by the current I through the resistor。 Resistors are used as part of electrical networks and electronic circuits.电阻器是一个二端口电子元件,电阻是阻止电流流动，通过按比例产生其端子之间的电压降的电流,也就是说，根据欧姆定律:V = IR.电阻 R 等于电压降 V 除以通过电阻的电流 I。电阻作为电子网络和电子电路的一部分。TransistorIn electronics, a transistor is a semiconductor device commonly used to amplify or switch electronic signals 。 A transistor is made of a solid piece of a semiconductor material , with at least three terminals for connection to an external circuit。 A voltage or current applied to one pair of the transistor’s terminals changes the current flowing through another pair of terminals。 Because the controlled current can be much larger than the controlling current, the transistor provides amplification of a signal。 The transistor is the fundamental building block of modern electronic devices， and is used in radio， telephone, computer and other electronic systems。 Some transistors are packaged individually but most are found in integrated circuits. 在电子技术中，晶体管是一种，常用来放大或进行开关控制电子信号的半导体器。晶体管是由一块固体半导体材料制成的，且至少有三个终端与外部电路连接。电压或电流适用于一双晶体管的终端改变目前流经的另一对终端.因为受控电流可以远大于控制电流，晶体管提供信号的放大。晶体管是构建现代电子设备的基本单元,并在收音机，电话，计算机和其它电子系统被使用.一些晶体管被单独包装，但大多数都在集成电路中。TransformerA transformer is a device that t...
