电气常识试题.doc

“电气常识”考核试题答案填入空格中1) 以下哪种用于发电站中生产电？涡轮机蒸汽水交流发电机2) 电是采用哪种方式进行远距离输送的？借助辅助中转站借助高架输电线路借助高电压借助铁路线3) 请说出电的三种实际应用例子?a)b)c)4) 当元素受到外力或负荷作用时，处于外侧轨道的电子会发生什么情况？5) 为什么当离开了其外侧轨道的自由电子会被原子吸引？6) 电功率的单位是什么？7) 你做以下检测时使用什么仪器：a) 电压b) 电流c) 电阻8) 电流的单位是什么？9) 电阻的单位是什么？10) 要使电流流动需要什么？11) 请说出影响电流流动的四个因素。i)ii)iii)iv)12) 请简要描述什么是电阻。13) 有两种不同形式的电流，都是什么？a)b)14) 一般用什么符号表示直流电？15) 直流电可以在什么地方储存？16) 一般用什么符号表示交流电？17) 怎样称呼串连在一起的电池？18) 给一节电池做出记号并显示其极性。19) 哪种电池可以充电，湿电池还是干电池？20) What are the invisible lines of force, which surround a magnet called?21) Name two rules that apply to magnetism.a)b)22) Name the three ways of increasing the amount of electricity through magnetism.a)b)c)23) Describe the left-hand rule for generators.24) What is used to convert an AC to DC in a generator?25) Describe four ways to improve the output of a generator.a)b)c)d)26) What happens when an electric current passes through a conductor?27) Which rule determines the direction of the magnetic field surrounding a conductor?28) What is a coil with an iron core known as?29) Name two types of adjustable resistors.30) What is the formula for calculating the sum of any three resistors, connected in series?31) Draw a circuit of 3 resistors, R1, R2 and R3 in parallel.32) How would you connect a voltmeter when measuring a voltage?33) What is the total voltage of three batteries, of 2V each, connected in series?34) What is the total current in the following circuits?a) b) 35) State ohms law.36) Draw the magical triangle.37) Define Electric Power.38) What is th