电气工程专业英语试卷及参考答案

《电气工程专业英语》试卷一、根据英文单词，写出中文意义（20X0.5=10,共10分）alternator 交流发电机automation 自动控制，自动操作bandwidth 带宽，频带宽度built-in 内置的，固定的，嵌入的capacitance 容量，电容charge 负荷，电荷，费用，充电coil 线圈converter 转换器，变换器diode 二极管impedance 阻抗，全电阻insulator 绝缘体semiconductor 半导体sensor 传感器suppression 抑制switch 开关，电闸threshold 临界值vacuum 真空，空间vector 向量，矢量waveform 波形ammeter 电表二、根据中文意义，写出英文单词（20X0.5=10,共10分）n.近似值,接近,走近Approximationn.能力，性能，容量Capabilityv.补偿,偿还Compensaten.损耗Depletionadj.微分的Differentialn.打扰,干扰Disturbancen.以太网Ethernetn.频率, 周率Frequencyadj.不相容的, 矛盾的n.隔绝, 绝缘adj.瞬间的, 刹那间的Momentaryn.极性Polarityn.转发器,中继器Repeatern.排斥Repusionn.阻力，电阻，阻抗Resistancevt.模拟,模仿Simulaten.晶体管Transistorn.传感器，发送器，传递器n.阀n.波长三、根据英文词组，写出中文意义（30X0.5=15,共15分）between…and在……之间on the other hand 另一方面take advantage of 利用negative charge 负电荷electric field 电场free electron 自由电子current flow 电流sine wave 正弦波Root-Mean-Square 均方根（值）series circuit 串联电路voltage drop 电压降parallel circuit 并联电路compound circuit s复合电路parallel branch 并联分支decimal system 十进制系统programmable controller 可编程控制器truth table 真值表carbon brus 碳刷permanent magnet 永久磁铁armature field 电枢场magnetic lines 磁力线.proportional system 比例系统 sampling period 采样周期 analog signal 模拟信号 baud rate 波特 discrete input 开关量输入 limit switch 限位开关 proximity switch 接近开关 industrial bus 工业总线 voltage difference电压差四、根据英文缩写，写出英文完整形式及中文意思（10X2=20,共20分）PLC PPI CNC EIA RF FCCCMOS VLSI CEMF五、根据下列方框中所给的词填空（5X1=5,共5分）Resistance in a material arises from the collision of electrons with the atoms and with each other as they move. The ___ 1、 collisions ___ produce heat, increasing the temperature of the material. Consider the ordinary toaster. Current flows through the ___2、wires ___ of the power cord and through the toaster's filament (the glowing wire you see inside). The same current must flow in the power cord as flows through the filament. The cord has very little ___ 3、resistance ___, while the filament has considerably more. Since the filament has a much higher resistance than the cord, it ___ 4、produces ___ much more heat. That's as it should be. You want the heat for your toast, but you do not want the power cord getting ___ 5、hot ___! The standard incandescent light bulb is another example. The filament inthe light bulb glows white hot (hence, the word "incandescent") to produce light and a lot of heat as well. But, the low-resistance power cord stays cool.六、根据下列短文回答问题,回答请使用英文。

（10X1=10,共10分）Electric PotentialElectric potential is what drives current. You may know electric potential by another term that we will use ...voltage. This name comes from the unit of potential, which is the volt (denoted V). When you buy an AA battery, you are buying a device that provides a potential of 1.5 V between its positive and negative terminals. Your car battery maintains about 12 V between its terminals. And the potential between the two slots in a household electrical outlet is about 120 V . You are probably already familiar with a basic truth about electric potential. All other things being equal, a greater potential will create a greater current. But what is electric potential?Water can provide a good analogy (although far from perfect!) for both current and potential. Consider a pipe that comes out of the bottom of a large tank of water. You open the spigot and water flows. The flow rate of the water is analogous to current. Common sense tells you that the higher the water level in the tank, the higher the flow rate in the pipe. The height of the water level is analagous to electric potential. A greater potential will cause a greater current.Where this analogy fails is with the battery. The tank stores water and as the height slowly decreases, so does the water flow. A battery does not store charge! It is always electrically neutral and for whatever amount of charge leaves one terminal, an equal amount must come into the other. A battery is more analogous to the water pump. A battery, therefore, is an electron pump! It has the ability to push electrons directly proportional to its voltage rating. And, it does this through a chemical reaction. The battery becomes "discharged," (an unfortunately misleading term), when the chemicals in the battery are used up. Most batteries maintain a fixed potential until near the end of their life. The 120 V potential of a household outlet is produced in a very different way.1. What is electric potential? What is another term people will use for it? Electric potential is what dives current. The term people will use is voltage.2. What is the potential between the two slots in a household electrical outlet? The potential between the two slots in a household electrical outlet is a bout 120V .3. What is the relationship between the potential and the current when all other things are equal? The greater the potential the greater the current.4. What can be a good analogy (although far from perfect!) for both current and potential?.Water.5. What is analogous to current?The flowrate of the water is analogous to current.6. What is analagous to electric potential?The height of the waterlevel is analogous to electric potential.7. What is more analogous to the water pump?A battery is more analogous to the water pump.8. What is a battery?A battery is an electron pump.9. What can a battery do? And how?It can push electrons directly proportional to its voltage rating .And, it does thisthiough a chemical reaction.10. What do most batteries maintain until near the end of their life?Most batteries maintain a fixed potential until near the end of their life.七、根据下列短文填空（10X1=10,共10分）Forces between two electrically-charged objects can be extremely large. Most things are electrically neutral; they have equal amounts of positive and negative charge. If this wasn’t the case, the world we live in would be a much stranger place. We also have a lot of control over how things get charged. This is because we can choose the appropriate material to use in a given situation.Metals are good conductors of electric charge, while plastics, wood, and rubbers are not. They are called insulators. Charge does not flow nearly as easily through insulators as it does through conductors, which is why wires you plug into a wall socket are covered with a protective rubber coating. Charge flows along the wire, but not through the coating to you.Materials are divided into three categories, depending on how easily they will allow charge (i.e., electrons) to flow along them. These are:•conductors - metals, for example•semi-conductors - silicon is a good example•insulators - rubber, wood, plastic for exampleMost materials are either conductors or insulators. The difference between them is that in conductors, the outermost electrons in the atoms are so loosely bound to their atoms that they are free to travel around. In insulators, on the other hand, the electrons are much more tightly bound to the atoms, and are not free to flow. Semi-conductors are a very useful intermediate class, not as conductive as metals but considerably more conductive than insulators. By adding certain impurities to semi-conductors in the appropriate concentrations the conductivity can be well-controlled.1. ____Metals ____ are good conductors of electric charge, while plastics, wood, and _rubbers _are not.2. Materials are divided into three categories. They are ________, _______ and _________.3. Plastics, wood, and rubbers are used as examples of ________.4. ____ What Catholic saint____ is a good example of semi-conductors.5. Semi-conductors are a very useful _____intermediate _________ class, not as __ conductive ________ as metals but considerably ____ more _______ conductive than insulators.八、把下列句子翻译为中文（5X2=10,共10分）1)Ohm's Law deals with the relationship between voltage and current in an ideal conductor.欧姆定律涉及理想导体中的电压与电流关系。