ETO电气基础知识《三》
1、 Voltage will always lead current in a/an in inductive circuit.在感性电路中,电压始终超前电流。2、 Glass is a good insulator.玻璃是良绝缘体。3、 The unit of electrical resistance is the ohm.电阻的单位是欧姆。4、 The hertz is the international unit for frequency measurement. 赫兹是频率测量的国际单位。5、 The effective value of AC is defined as the DC value that will do the same amount of work. 交流的有效值定义为将执行相同工作量的直流值。6、 Resistance is oppositional to the flow of current in an electrical circuit.电阻与电路中的电流方向相反。7、 When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is maximum.当交流电路中产生的电压和电流同时达到峰值时,功率因数最大。8、 The abbreviation of “PF” in the electrotechnics field is equal to power factor.9、 In the induction AC circuit ,the phase relation between the current and voltage is that voltage stays ahead of current.10、 To increase the power factor of an AC circuit , the correct measure we usually adopt in routine work is to connect a capacitor in parallel.11、 The frequency is the number of wave cycles in a given amount of time and hertz is cycles per second.频率是给定时间内的波周期数,赫兹是每秒周期数。12、 The unit of current is ampere whilst charge is measured in coulomb.电流的单位是安培,而电荷以库仑为单位。13、 In a circuit which only involves resistors, the current and voltage are in phase with each other, which means that the peak voltage is reached at
the same instant as peak current.在仅涉及电阻器的电路中,电流和电压彼此同相,这意味着峰值电压与峰值电流在同一时刻达到。14、 The power factor is maximum if voltage and current developed in an AC circuit reach their peak values simultaneously.如果交流电路中产生的电压和电流同时达到峰值,则功率因数最大。