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Unformatted text preview: R = Resistance of the coil. • Eddy Currents – electric currents that arise in a piece of conductor when the magnetic flux is changing through it • A Transformer is a device used to step up or down an AC voltage. – The transformer equation results from Faraday’s law. • A step-down transformer ( V P >V S ) requires N P >N S • A step-up transformer ( V P <V S ) requires N P <N S – If transformer is 100% efficient, (no power is lost due to eddy current) input power equal output power Primary coil ( N P turns) Secondary coil ( N S turns) P V S V Laminated iron core to trap and guide magnetic flux. Lamination eliminates eddy current S S P P V I V I = More Applications of Faraday’s Law P S P S N N V V = Transformer equation...
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This note was uploaded on 12/06/2011 for the course PHYSICS 111&112 taught by Professor Unknown during the Spring '11 term at Ohio State.
- Spring '11