A series is derived which gives the relative change in the magnetic moment of the particle caused by a slow but finite rate of variation of the magnetic-field strength. Under ordinary physical conditions, the series is convergent. The first few terms of the series reduce to an approximation ...
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What causes a magnetic field? How is a magnetic field generated in general? What is magnetic field density? Can a magnetic field exist without an electric field? Where is the edge of a magnetic field? What would happen if the Earth had no magnetic field?
Now, Noboru Ikeya and Jonathan Woodward at the University of Tokyo have shown that a magnetic field causes chemical changes that can affect cellular behaviour. They achieved this with the aid of a cellular chemical that fluoresces depending on the external magnetic field. When they waved a ...
Magnetic field 是在iron core里变化,the induced p.d. 存在于 secondary coil。最好,我们将这些点串起来:alternating p.d. applied in the primary coil causes the changing magnetic field, which induces alternating p.d. in the secondary coil. 对比给出的答案,我们很容易拿到了full mark。
Floating in the magnetic field, a simple puff of air is enough to set the turbine spinning for quite some time. It makes for a captivating desk ornament, and one that can be tinkered with by changing the turbine blades for different performance. It may be frivolous, but at the larger sc...
A magnetic field, which causes a magnetic force and alters the flow, is one of the most important parameters in this context. This is crucial for requests in districts like the development of crystal in fluids, photoelectric bundle, and atomic reactor abating. Consequently, it is fundamental ...
Furthermore we find that although the system is nominally in a stale of equilibrium, the presence of the magnetic field causes the flow of oppositely directed currents which are tangential to the electrodes and occur at different points in the inter-electrode space, only the sum of such ...
Unlike regular elastic materials, when auxetic materials are compressed, they become thinner in the direction perpendicular to the applied force. Despite their outstanding mechanical properties, a systematic design of new and controlled auxetics remains
(ii) The storage of information relies on the magnetic retention properties, arising from the magnetic anisotropy of storage layer. (iii) The write operation is performed by changing the orientation of storage layer magnetization, which can be achieved by inducing a magnetic field, or by using ...