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Use of the perfect electric conductor boundary
Use of the perfect electric conductor boundary

... Our approach is to solve Maxwell’s differential equations with a discrete space-time formulation, using the Finite Difference Time Domain (FDTD) method. The Perfectly Matched Layers (PML) method is used as an absorbing boundary condition, to prevent further spread of the electromagnetic wave to the ...
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Activity: Magnets and Magnetic Fields

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AGS General Science Chapt 8

... Science in Your Life How do conductors and insulators work? Look at the electrical cords that carry electric current in your home. You will notice that the metal wire that carries the electricity is covered with a material. This material is often plastic. The wire in the center of the electrical cor ...
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Vector potential, electromagnetic induction and “physical meaning”

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What is a magnet? - Northern Highlands

... cobalt. Like paramagnetic atoms, the electrons in a ferromagnetic atom do not cancel each other’s magnetic fields completely. Each atom is therefore a tiny magnet. The difference is that individual atoms of ferromagnetic materials do not act randomly like atoms in paramagnetic materials. Instead, at ...
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to go to any of the pages listed below, click on its title

... New technology has provided better detectors for the tiny magnetic fields produced by organs. One of the newest and most sensitive detectors is known as SQUID. This name stands for Superconducting Quantum Interference Device. Much of the research done with SQUID on human magnetism is centered on the ...
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Magnetism Magnetism

... magnetic forces to lift the train off the track, reducing the friction and allowing the train to move faster. These trains, in fact, have reached speeds of more than 500 km/h (310 mi/h). In addition to enabling the train to reach high speeds, the lack of contact with the track provides a smoother, q ...
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Evolution of magnetic helicity in the course of kinetic magnetic

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... Voltages and currents are integrated effects of electric and magnetic fields respectively. Electromagnetic field problems involve three space variables along with the time variable and hence the solution tends to become correspondingly complex. Vector analysis is a mathematical tool with which elect ...
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HELICON WAVE EXCITATION WITH HELICAL ANTENNAS

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... 1.1.2 Vector form of Coulomb’s law for like and unlike charges. 1.1.3 Variation force with distance (F.vs.r graph) (Ref. 2, 21.3) 1.2 Superposition principle 1.2.1 Statement and explanation with illustration 1.2.2 Illustrations with specific configuration of three charges (triangular form) and four ...
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... that helium acts like salt raising the density and in diffusing more slowly than heat. The heat and solute being two diffusing components, thermosolutal (double-diffusive) convection is the general term dealing with such phenomenon. The Hall current is likely to be important in many geophysical and ...
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... Momentum Balance d P    mv  PA  u  Fsf  mtot g dt Important Notes: 1. All terms are considered vectors, so the direction must be specified (x, y, or z). 2. The force due to gravity only acts along the ydirection. 3. This equation assumes that the flow is turbulent, and the velocity profile ...
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... exhibits associated stringlike behavior via dynamics of the magnetic field lines in the plasma [5–8] or due to thin isolated flux tubes of plasma that could be described by an one-dimensional string [9]. Tension of such a string loop prevents its expansion beyond some radius, while its world sheet c ...
CHAPTER- 1 : FUNDAMENTALS OF MAGETIC
CHAPTER- 1 : FUNDAMENTALS OF MAGETIC

Magnetism can produce current.
Magnetism can produce current.

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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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