Through electrostatics and examples of low-frequency alternating current and direct-current circuit, the problem of zero potential point is queried and clarified.
通过静电学、低频交流、直流等电路实例，质疑了电势零点问题，并对此进行了澄清。
The difference between a direct and an alternating current is that a direct current always flows in one direction.
直流电和交流电的区别在于直流电总是向一个方向流动。
It must be set up suitable quiescent point in order to works in linear region. This decides that the analysis of amplifier includes direct current analysis and alternating current analysis.
要用他对信号进行不失真地放大，必须设置适当的工作点，使电子器件工作在近似线性区域，这就决定了放大器的分析包括直流分析和交流分析。
When the power machines of wind-tunnel work such as alternating-current machine governor and direct-current machine governor and relay, they will bring about strong interference.
风洞中交流电机调速器、直流电机调速器及继电器等动力设备运行时将产生强干扰。
Ceramic insulator is widely used in alternating and direct current transmission system. But there exist some problems when using ceramic insulator in direct current transmission system.
瓷绝缘子广泛使用在交直流输电系统中，但在直流输电系统中使用还存在很多问题。
The DC/AC conversion section converts a direct current inputted from a direct current power source into an alternating current, and outputs the alternating current.
该DC /AC转换部分直接转换为电流输入由直流电源成交流电，并输出交流电。
A direct current control circuit adopts an alternating current contactor, so the utility model prolongs the service life and improves the reliability.
在直流控制电路中采用了交流接触器，解决了整机的寿命与可靠性。
A direct current control circuit adopts an alternating current contactor, so the utility model prolongs the service life and improves the reliability.
在直流控制电路中采用了交流接触器，解决了整机的寿命与可靠性。
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