By calculating, the article analyzes in detail the spread situation of electric magnetic fields in round space when the pointelectriccharge moves in a low speed, and makes the diagram.
通过计算，详尽分析了点电荷低速运动时，周围空间电磁场分布情况，并给出图示。
2
Too many charge concentrate at a sharp point may ionize the air and produced electric wind.
太多电荷集中在尖角时，会令空气电离，产生电风。
3
The potential energy of a unit charge at any point in an electric circuit measured with respect to a specified reference point in the circuit or to ground; voltage.