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。

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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。

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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。

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Inverters and microinverters convert the direct current (DC) power produced by solar panels into alternating current (AC) used in homes and businesses.

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One of the considerations was the relative safety of direct current - the first electric chair seems to have been built (and then used) to prove that alternating current was more of a killer.

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Traditional inverters gather power from all or most of the panels in an installation and use transformers, capacitors and switches to change it from direct current to alternating current.

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