The optimum design was realized associated with the relationship among coil turns, exciting current and electromagnetic attraction force.

结合线圈圈数、激励电流与电磁吸力之间的关系，完成了电磁系统的优化设计。

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Conclusion is made that calculation and test of the attraction force is key important in the probe design. And some guiding advice is given to the design of the electro-magnet.

明确了电磁铁吸合力的计算、实验是电子清纱器检测头设计的重要基础环节，进而对电子清纱器检测头电磁铁的设计方法给出指导意见。

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So, when we get really close together, granted, there is a net positive negative charge with a Coulombic force of attraction.

当它们真正离得很近时，假设有一个带正负电的电荷,带有库仑引力。

麻省理工公开课 - 固态化学导论课程节选

And then the potential energy, the energy is stored here due to the coulombic force of attraction between the electron and the nucleus.

然后说势能,位能其实就是,由电子和原子核之间的库仑引力而形成的能量。

麻省理工公开课 - 固态化学导论课程节选

The reason is because the predominant force at this point is going to be the attraction that's being felt between the nuclei and the electrons in each of the atoms.

这是因为这时候最主要的力,是吸引力，它来自于,其中一个原子的电子与另外一个原子的原子核之间。

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The coil is suspended in an external magnetic field and the current running through it adjusted so that the attraction between the two magnets balances the gravitational force on the suspended mass.

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An uncanny force binds the speaker to the living, but the reality and attraction of the other world, death, strikes him so powerfully that it interrupts his speech on behalf of faith and life.

WSJ: Austin Ratner, Author of In the Land of the Living, on Aposiopesis | Word Craft