Electromagnetic Induction

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Michael Faraday was a chemist and physicist from England. He invented electromagnetic induction in 1831. Electromagnetic induction as defined by Stuart Bushong is: An electric current is induced in a circuit if some part of that circuit is in a changing magnetic field. This observation is summarized in what is called Faraday’s Law, or the first law of electromagnetics. After a series of different experiments, Faraday determined that an electrical current cannot exist just by the presence of a magnetic field. If magnets are set next to a coil, the meter would generate no current. Yet if the magnets are moved back and forth near the coil, the ammeter indicates a current. Without electromagnetic induction we would not have MRI, and we would not be able to produce x-rays. Auto-transformers, step-up transformers, and step-down transformers use electromagnetic induction to change currents therefore being able to produce kVp, mAs, and DC current using rectifiers when it comes to x-rays. The following paper will describe in brief detail a little of Michael Faraday’s life, how electromagnetic induction came about, how MRI uses electromagnetic induction to function, and an explanation on how auto-transformers, step-up transformers, and step-down transformers work and change currents to produce x-rays. Electromagnetic induction is truly a phenomenon in this day and age. If it wasn’t for Faraday’s discovery, the medical field would definitely be missing out on one of the most important medical concepts to date. Faraday’s inventions helped to form the foundation of electric motor technology, and it is because of his efforts that electricity is so important in the technology world.

Electromagnetic Induction

Michael Farada...

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...on at its best!

Electromagnetic induction is truly a phenomenon in this day and age. If it wasn’t for Faraday’s discovery, the medical field would definitely be missing out on one of the most important medical concepts to date. Auto-transformers, step-up transformers, and step-down transformers are all governed by electromagnetic induction. They would not be able to function without it, and neither would we. Faraday’s inventions helped to form the foundation of electric motor technology, and it is because of his efforts that electricity is so important in the technology world today.

Works Cited

Bushong, S. C. (2008). Radiologic science for technologists: Physics (9th ed.). St. Louis, MO: Mosby, Elsevier.

British Broadcasting Corporation. (2011). Michael faraday history. Retrieved from http://www.bbc.co.uk/history/historic_figures/faraday_michael.shtml

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