For square wave motor, the thesis set forth equivalent weakening magnet field control way by use of transformer electric potential to...

对方波电机，文中提出了一种新型的用变压器电势抵消激磁电势而实现的等效弱磁控制方法，并作了理论分析与实验验证。

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Inaccurate statements of this theorem usually occur in some teaching materials, which bring some mistakes in solving the problem of electric current making magnet field.

有些教科书中对该定理叙述不准确，造成求解电流产生磁场的问题中出现某些错误。

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An electron gun code is used to simulate the electron trajectory, the influence of electrode shape, magnet field, electron trajectory on the electron beam have been studied.

利用电子枪模拟程序对电子轨迹进行模拟计算，研究了电极形状、磁场分布以及电子轨迹与电子注参量的影响，为磁控注入电子枪的设计提供了理论依据。

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The magnet creates a field which changes the polarity of a tiny, tiny portion of the metal particles which coat each platter's surface.

这个磁体创建一个,能改变覆盖在,磁盘表面小金属粒子的磁极。

哈佛公开课 - 计算机科学课程节选

At very high doses, exposure to a magnetic field can cause the muscles to twitch and some people have reported feeling dizzy or sick when moving their heads quickly around a high-field magnet.

BBC: NEWS | Health | Planned scan-limit delay welcomed

As the train's magnets pass over a frame, they induce an electric current in it and this, in turn, generates a magnetic field which repels the magnet that started the whole process and thus levitates the train.

ECONOMIST: Maglev trains

In the 70 or so microseconds (millionths of a second) before the equipment is mashed, the inrushing walls of the magnet will squeeze and concentrate the magnetic field.

ECONOMIST: Magnetism