04 Faraday's Law - Faradays Law Faradays Law (I) d E dl dt...

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Faraday’s Law
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Faraday’s Law (I)  S C dS B dl E dt d Electromotive Force (emf) ------ V l f Total Magnetic Flux ------ Wb (Webers) dl E C emf  S dS B
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Faraday’s Law (II) dS B dl E t d l  S C dt C dl E B • The emf generated around a closed contour C is lated to the time rate of change of the total related to the time rate of change of the total magnetic flux through the open surface S bounded by that contour.
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Faraday’s Law (III) t d d  dS B dl E • Lenz’s Law: The emf induced in the contour is of a polarity dt dt S C that tends to generate an induced current whose magnetic flux tends to oppose any change in the original magnetic flux. gg g i B B ++ --- V ind d V d + + + dt ind
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Faraday’s Law (IV) Top view B --- B + + + + V ind - V ind N turns dt d N V ind
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Inductor Operation 1 (Like Generator) B ext i i R R B ext --- V ind + V ind i i + + + - turns B from i N turns Note: B is total magnetic flux density.
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This note was uploaded on 11/30/2011 for the course EEL 6208 taught by Professor Staff during the Fall '11 term at University of Central Florida.

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04 Faraday's Law - Faradays Law Faradays Law (I) d E dl dt...

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