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20.3 Motional emf
20.3 Motional emf

SurveyMotors
SurveyMotors

... In the early 1800’s, Michael Faraday notes that iron filings line up around a magnet to show “force field lines”. ...
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...  The response of a material to a Magnetic Field H is called Magnetic Induction B  The relationship between B and H is a property of the material  In some materials and in free space B is a linear function of H but in general it is much more complicated and sometimes it is not even single valued ...
magnetismintrowebquest8word
magnetismintrowebquest8word

... Go to http://istp.gsfc.nasa.gov/earthmag/lodeston.htm and answer following questions about Lodestone 1) What if the Lodestone was never discovered? 2) What is the other name for the rock that is called a Lodestone? 3) What is the difference in between these two rocks? If any. 4) Which is more common ...
Physics of Relativistic Jets
Physics of Relativistic Jets

... GRBs: g~102 - 103; minimal z0~1011 cm – marginally OK. But achromatic breaks in the afterglow light curves and statistics imply gQ>>1, which is fulfilled only if the flow remains Poynting dominated. Magnetic dissipation is necessary. ...
Sample Quizzes Physics 132
Sample Quizzes Physics 132

... (1) The figure shows a current, i, flowing through two halfinfinite wires. Use the law of Biot and Savart to find the magnetic field, B, at the point P indicated in the figure. ...
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New results on the age- activity relation from Kepler Alfio Bonanno

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... earth. On Earth one needs a sensitive needle to find magnetic forces, and out in space they are usually a lot weaker. But beyond the dense atmosphere, such forces have a much bigger role, and a region exists around the Earth where they dominate the environment, a region known as the Earth's magnetos ...
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Plate Tectonics - University of Hawaii at Hilo

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Magnetic Materials Background: 2. Origins of Magnetism

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... H on a topographic map - see Figure 6.8) is the geographic north pole where all longitude lines meet. All maps are laid out with true north directly at the top. Unfortunately for the wilderness traveler, true north is not at the same point on the earth as the magnetic north Pole which is where your ...
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Lecture 7 Extra

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... The force produced by a magnetic field on a single electron depends on the velocity of the electron and the strength of the magnetic field.  F=qvB  q is the charge measured in Coulombs  v is velocity measured in m/s  B is magnetic field strength measured in T  The direction of the force is giv ...
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I. Characteristics of Magnets

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8. Magnetic fields

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Conservation Laws in Ideal MHD - Harvard

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Oersted, Hans Christian

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2011-Magnetohydrodynamics%20in%20progress?

... •The degree of ionization, α is defined as α = ni/(ni + na) where ni is the number density of ions and na is the number density of neutral atoms. •Due to the complexity by which plasmas are analyzed, their behavior is can be seen through two different models: •Fluid Model: One simple fluid model, ma ...
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Chapter27_11

... http://gsc.nrcan.gc.ca/geomag/nmp/daily_mvt _nmp_e.php ...
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213 - jpsaos

... Eight pairs of electromagnets are shown below. The current in the left electromagnet is one amp and the current in the right one is two amps in each case. They are also separated by the same distance, and they have the same length and diameter. Carefully observe the orientation of the coil and direc ...
Magnetism - Howard Elementary School
Magnetism - Howard Elementary School

... repel and opposites attract, and the force between is inversely proportional to the distance between them. This means that closer is stronger, and further is weaker. Electric charges are positive or negative, magnetic poles are north or south. One main difference is that magnetic poles cannot be iso ...
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Magnetohydrodynamics



Magnetohydrodynamics (MHD) (magneto fluid dynamics or hydromagnetics) is the study of the magnetic properties of electrically conducting fluids. Examples of such magneto-fluids include plasmas, liquid metals, and salt water or electrolytes. The word magnetohydrodynamics (MHD) is derived from magneto- meaning magnetic field, hydro- meaning water, and -dynamics meaning movement. The field of MHD was initiated by Hannes Alfvén, for which he received the Nobel Prize in Physics in 1970.The fundamental concept behind MHD is that magnetic fields can induce currents in a moving conductive fluid, which in turn polarizes the fluid and reciprocally changes the magnetic field itself. The set of equations that describe MHD are a combination of the Navier-Stokes equations of fluid dynamics and Maxwell's equations of electromagnetism. These differential equations must be solved simultaneously, either analytically or numerically.
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