How is a magnetic field created? What is the shape of an electron? Explain. How do you relate linear mass density to diameter of a string? What is a primary difference in tonal quality between a fretted instrument (e.g., viola da braccio or guitar) and a fretless one (violin or oud...
The rotor is a series of large electromagnets that spins inside a tightly-wound coil of copper wire, called the stator. The magnetic field between the coil and the magnets creates an electric current. In the Hoover Dam, a current of 16,500 amps moves from the generator to the transformer,...
The fully penetrated state of anisotropic superconductors which are extended in the c -axis direction is analyzed using a model to describe the current distributions. Based on magnetooptical investigations on a rectangular single crystal and on a cubic melt-processed YBa 2 Cu 3 O 7未 sample, ...
To make a permanent magnet, all you have to do is encourage the magnetic domains in a piece of metal to point in the same direction. That's what happens when you rub a needle with a magnet — the exposure to the magnetic field encourages the domains to align. Other ways to align magn...
Increasing current boosts the electromagnet's magnetic force, and decreasing current lowers the magnetism. When the current jumps to unsafe levels, the electromagnet is strong enough to pull down a metal lever connected to the switch linkage. The entire linkage shifts, tilting the moving contact ...
4. Can a human tissue or organ be fully regenerated? 4.人体组织或器官可以完全再生吗? 5. How is immune homeostasis maintained and regulated? 5.如何维持和调节免疫稳态? 6. Is there a scientific basis to the Meridian System in traditional Chinese medicine?
Figure 5. An electromagnet is just a piece of iron or other magnetic metal with a wire coil wrapped around it. By itself it does nothing. However, if you pass an electric current through the wire, a magnetic field is formed in the iron bar, and it becomes a magnet, as in Figure 6...
How is a reverse fault formed?Fault Lines:Fault lines are fractured sections of the Earth's crust and are the most frequent causes, and sites, of earthquakes. Some fault lines are ancient and no longer active, while other faults can cause several earthquakes per year, though large destructive...
Similarly, if you allow electrons to move through a metal wire, a magnetic field will form around the wire. Thanks to Wooly Willy, we can see that there's a definite link between the phenomena of electricity and magnetism. A generator is simply a device that moves a magnet near a wire ...
But this isn't just any magnet -- we're dealing with an incredibly strong system here, one capable of producing a large, stable magnetic field. The strength of a magnet in an MRI system is rated using a unit of measure known as a tesla. Another unit of measure commonly used with ...