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Microwave Methods and Detection Techniques for Electron Spin
Microwave Methods and Detection Techniques for Electron Spin

... Electron spin resonance (ESR) originated more than sixty years ago, when Zavoisky (1945) reported the first successful measurement of ESR signals in several salts, copper sulfate and manganese sulfate [1]. ESR is applied whenever a system has unpaired electrons. For instance, it can be used to under ...
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... first proposed in 1908 by Einstein and Laub, exists that is consistent with Maxwell’s macroscopic equations and complies with the conservation laws as well as with the requirements of special relativity. While the Lorentz law requires the introduction of hidden energy and hidden momentum in situatio ...
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Electric Power Acquisition from the Vibration of an Electric Vehicle

... using a permanent magnetic linear power generator. A mover of the linear power generator can convert any mechanical vibration to electric power. A mover of the proposed linear power generator, which includes permanent magnets, is linearly driven through a stator by an external force, directly. There ...
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... strength and direction of the magnetic field at a large number of locations (or at every point in space). Then, mark each location with an arrow (called a vector) pointing in the direction of the local magnetic field with its magnitude proportional to the strength of the magnetic field. An alternati ...
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... As a result the centers of the positve and negative charges move in opposite directions and do not coincide. Thus a non-zero electric dipole moment p appears. This is known as "induced" electric dipole moment and the molecule is said to be "polarized". When the electric field is removed p disappears ...
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A Dynamical Theory of the Electromagnetic Field

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How Can Electricity Cause Magnetism?

... Background and Misconceptions: Electromagnets utilize a simple rule of electricity: The flow of electricity can create a magnetic field, and a moving magnetic field causes electricity to flow. This simple interaction of electricity is what causes an electromagnet to operate. As electricity flows out ...
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Representing Vector Fields Using Field Line Diagrams

... An array of field lines is called a field line diagram, and it is a way of representing both the direction and the strength of a vector field. The direction is found by focusing on an individual field line, as above. The strength is found by looking at the density of field lines. For example, the fi ...
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... Background: The flow of electricity is readily compared to the flow of water. A water hand pump will be used to illustrate the flow of electricity in a close circuit. The water is moved when the pump is pulled upwards. The pressure applied during this upward stroke is analogous to the voltage in an ...
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... physical laws. After all, a constant is just a constant. This segue through Maxwell’s equations was made to develop an understanding of how the determinants of the speed of light compare with those of the speed of sound. But before we do that, it’s worth noting some of the implications and interpret ...
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... motion in magnetic fields, where the action integral associated with the fast gyro-motion, the adiabatic invariant, l, plays a central role in the guiding center theory approximation where gyro-motion is averaged out. Applications of guiding center theory are diverse and range from particle confinem ...
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The electric field

... 2. The magnitude of the electric field associated with plate 1 is /(20) and the electric field lines for this plate are as shown. When the two plates are placed parallel to one another, the magnitude of the electric field is A /e0 between, 0 outside. B /e0 between, ± /(2e0) outside. (C) zer ...
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Eddy current

Eddy currents (also called Foucault currents) are circular electric currents induced within conductors by a changing magnetic field in the conductor, due to Faraday's law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC electromagnet or transformer, for example, or by relative motion between a magnet and a nearby conductor. The magnitude of the current in a given loop is proportional to the strength of the magnetic field, the area of the loop, and the rate of change of flux, and inversely proportional to the resistivity of the material.By Lenz's law, an eddy current creates a magnetic field that opposes the magnetic field that created it, and thus eddy currents react back on the source of the magnetic field. For example, a nearby conductive surface will exert a drag force on a moving magnet that opposes its motion, due to eddy currents induced in the surface by the moving magnetic field. This effect is employed in eddy current brakes which are used to stop rotating power tools quickly when they are turned off. The current flowing through the resistance of the conductor also dissipates energy as heat in the material. Thus eddy currents are a source of energy loss in alternating current (AC) inductors, transformers, electric motors and generators, and other AC machinery, requiring special construction such as laminated magnetic cores to minimize them. Eddy currents are also used to heat objects in induction heating furnaces and equipment, and to detect cracks and flaws in metal parts using eddy-current testing instruments.
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