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Dynamo theory - Wikipedia, the free encyclopedia
The dynamo theory proposes a mechanism by which a celestial body such as the Earth generates a magnetic field. In 1905, shortly after composing his special relativity paper, Albert Einstein describe...
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Dynamo Theory and Earth's Magnetic Field; Paul Demorest; May 21, 2001; 1 Introduction; The Earth's magnetic eld belongs in that class of physical phenomena which are commonplace yet also very complex. The theory behind the generation of a magnetic eld, known as dynamo theory, is still an active area of research.
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Let us now investigate how the solar wind and the interplanetary magnetic field affect one another. ... The hot coronal plasma making up the solar wind possesses an extremely high electrical conductivity. ... Of course, the Sun does rotate, with a (latitude dependent) period of about 25 days.23 Since the solar photosphere is...
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Despite the many technicalities the themes of dynamo theory are straightforward: what type of velocities are capable of dynamo action, and what are the properties of the generated magnetic fields.
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The Son hubdynamo can also be used to power two 6v lights in series. The dynovoltage will then be around 12 Volts. This is possible because the dynamo can be assumed to be a constant current device. The 6v designation presumes Conventional bottle generators can supply 12v as well in theory, but slip will be prohibitive.
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Dynamo theory is a vast field with almost a hundred years of history, starting with early ideas by Joseph Larmor in 1919. Dynamos are particularly important in connection with understanding magnetic fields in astrophysics.
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Among the dynamo theory topics explored will be: (i) the nonlinear saturation mechanism for dynamos; (ii) how experiments and observations constrain dynamo theory; (iii) how dynamos can operate in extreme parameter configurations, such as very low magnetic Prandtl number;
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KITP Program: Dynamo Theory (May 5 - July 18, 2008); Coordinators: Chris Jones, Daniel Lathrop, Steven Tobias, Ellen Zweibel ... Keith Moffatt; (Trinity College & KITP); Pat Diamond; (UCSD & KITP); Graeme Sarson; (Newcastle Univ. & KITP)
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How do we know if the dynamo theory is right? To the consternation of our desire to understand what's happening inside the planet we live on, Jules Verne's Journey to the Center of the Earth is still fiction.
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All of these fields are generated by the motion of electrically conducting fluids, the so-called dynamo effect. The precise details of what drives the motion, and indeed what the fluid consists of, differ widely though. ... Theory of Tokamak Transport: New Aspects for Nuclear Fusion Reactor Design...
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