Then they cannot be treated independently of each other, because the changing electric field produces a changing magnetic field and the newly produced changing magnetic field produces a changing electric field,
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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 magne...
magnetic field to generate heat in a tumour that is made up of ferromagnetic NPs, resulting in the thermal ablation of the tumour tissue and causing the tumour to be destroyed. Magnetic hyperthermia has been used experimentally to treat cancerous tumours in the liver, prostate, breast, brain, ...
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...
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 ...
The biological effects of high-gradient magnetic fields (HGMFs) have steadily gained the increased attention of researchers from different disciplines, such as cell biology, cell therapy, targeted stem cell delivery and nanomedicine. We present a theoret
(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 ...