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Electromagnetic Induction

A presentation about electromagnetic induction for Engineering.

Kayla Winkler

on 10 May 2011

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Transcript of Electromagnetic Induction

Electromagnetic Induction What is electromagnetic induction? Electromagnetic induction is not a complex concept. When a wire moves through a magnetic field, a force acts on the charges of the wire. Their potential energy is increased, which means their potential difference is increased. This is called inducing an EMF, EMF stands for electromotive force, but it's not really a force at all. It's measured in volts, just like potential energy. Electromotive force in volts equals the magnetic induction times the length of the wire times the velocity of the wire. How was electromagnetic induction discovered? In 1831, Michael Faraday made his discovery of electromagnetic induction. Michael Faraday He hypothesized that changing a magnetic field was needed to make a current in a circuit. To test this, he made a coil by wrapping wire around a paper cylinder. He then connected the wire to a galvanometer, which is an electric current detector. Galvanometer When a magnet was moved through the cylinder, the needle moved. Everytime the magnet stopped (didn't move), the needle copied the action by not moving. “I am busy just now again on electro-magnetism, and think I have got hold of a good thing, but can't say. It may be a weed instead of a fish that, after all my labor, I may at last pull up.” -Michael Faraday Faraday's Law of Induction Faraday's law of induction is everything that has been talked about, in other words, his laws summarizes the ways voltage can be generated. What is electromagnetic induction used for? Electromagnetic induction is most commonly used for electrical generators to produce electricity. Presentation by Kayla Winkler and Ginelle Judge Resources http://micro.magnet.fsu.edu/electromag/java/faraday2/
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