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Pdf - Text of NPTEL IIT Video Lectures
Pdf - Text of NPTEL IIT Video Lectures

... which has got an appearance just like the inverse square. Because you have got r minus r prime, which is r, is this vector, which is the field point and this is the source point; so r minus r prime is this direction from the source to the field. So, this is the cube of that distance of the denominat ...
A l - EN / Bilkent University
A l - EN / Bilkent University

Atoms, Energy, and Electricity Part IV
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Electricity and Magnetism

... prominent in the present edition. For setups possessing certain symmetries, a wisely chosen system of coordinates can greatly simplify the calculations. Appendix F gives a review of the various vector operators in the different systems. Compared with the second edition, the level of difficulty of th ...
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... Static electricity is associated with the gain or loss of electrons. Electromagnetic forces can attract or repel. Opposite charges attract each other, and like charges repel each other. Electric current is the flow of electrons. A complete, continuous path of current is called an electric circuit. C ...
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Chapter 34. Electromagnetic Induction Electromagnetic induction is

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Open the publication - UEF Electronic Publications

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James Clerk Maxwell - The Open University

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CHAPTER 18 ELECTRIC FORCES AND ELECTRIC FIELDS

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doc - The Crowned Anarchist Literature and Science Fiction

... Maxwell's development of the electromagnetic theory of light took many years. It began with the paper “On Faraday's Lines of Force” (1855–1856), in which Maxwell built on the ideas of British physicist Michael Faraday. Faraday explained that electric and magnetic effects result from lines of force t ...
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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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