A mapping F: U →Λ 2 (M 0 ), U 4 , satisfying the Maxwell equations is regarded as the tensor of an electromagnetic field in vacuum. The field is described on the basis of a special decomposition F = eω + h(*ω), where the mapping ω: U → G 1 is called the direction of...
In an electromagnetic field, the direction of the magnetic field is perpendicular to the direction of the electric field. If the electric field points north, the magnetic field cannot point ___. A. east B. south C. west D. north 相关知识点: 试题...
Light Wave:A light wave, often called an electromagnetic wave in reference to its constituent fields, is a transverse wave made up of an oscillating electric field perpendicular to an oscillating magnetic field. The wave propagates in a direction perpendicular to both the electric fie...
aAround 1860, she took 大约1860年,她采取了 [translate] aby changing the quantity and direction of the electromagnetic winding excitation current to adjust the size of the air gap magnetic field. 通过改变电磁式绕励磁潮流的数量和方向调整空气隙磁场的大小。 [translate] ...
electromagnetic Phenomenon) it can be seen that the induced magnetic field around the ring coil will obstruct the magnetic field movement of the magnet. According to the analysis of the principle of "mutual repulsion of the same direction magnetic field", the upper part of the induced magnetic ...
aThe electromagnetic coupling regulator controller can be ensure the generator output the stable voltage by changing the quantity and direction of the electromagnetic winding excitation current to adjust the air gap size in the magnetic field 电磁式联结管理者控制器可以是保证发电器通过改变电磁式绕励磁...
An electromagnetic wave travels in the free space along +z direction, and the electric field at point P and time t is measured to be E= 0.06V/m (in +y direction). How about the magnitude and direction of magnetic field B at point P and time t?
The electromagnetic torque in the motor is in the same direction as that of the rotating magnetic field, due to the interaction between the rotating flux produced in the air gap by the current in the stator winding, and the current in the rotor winding. 相关知识点: 试题来源: 解析 电动...
When the source and the field sensor (electricity and magnetism) both are stationary, it is possible to acquire the direction for the electromagnetic source. When electricity (E) and magnetism (B) sensor set is moving, plural indexes make the specification of the source possible. This method ...
The direction of polarization of an electromagnetic wave is defined to be the direction of the magnetic-field vector. () A. 正确 B. 错误 如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: B 复制 纠错 举一反三 施工作业的统计指标不包括( ...