More precisely it tells you that what you might have learned about electric fields deriving from electric potential becomes false if you have a variable magnetic field.
更精确地说，电势产生电场，这一观点是错误的，如果忽略变化磁场的存在的话。
In this article, it is pointed out that calculating induced electric field caused by variable magnetic field in constant velocity by analogical method is a simple method.
用类比方法来计算以恒定速率变化的磁场产生的感应电场是一个简便的方法。
"We've always known that the Earth's magnetic field is variable, constantly evolving in time," Raymond said.
“众所周知地球的磁场是变化的，无时无刻不在变化”雷蒙德教授说。
The vector magnetic potential is regarded as a variable to gain the two-dimension solution of excitation magnetic field and armature response magnetic field.
并以矢量磁位作为求解变量得到励磁磁场和电枢反应磁场的二维解。
Aimed at the nonlinear magnetic field and the imprecise model of switched reluctance motor, the variable-structure control method with sliding mode is presented.
针对开关磁阻电机存在磁场严重的非线性且数学模型不精确等问题，提出了一种滑模变结构控制方法。
The displacement current corresponding to a variable irrotational electric field does not excite any magnetic field.
对应于可变有源无旋电场的位移电流不激发磁场。
At present, the frequency of the magnetic field applied to heart stimulation is fixed, not variable according to the physiological characteristic of the heart.
目前应用于心脏刺激的磁场频率都是固定的，而不是根据心脏的生理特征实现的磁场刺激。
A new viewpoint on electric essence of the magnetism is presented in this paper. That's to say why the variable electric field induces magnetic field.
对为什么电场的变化会产生磁场，进而产生磁力这一磁现象电本质进行了讨论研究。
A new viewpoint on electric essence of the magnetism is presented in this paper. That's to say why the variable electric field induces magnetic field.
对为什么电场的变化会产生磁场，进而产生磁力这一磁现象电本质进行了讨论研究。
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