Electromagnetic Induction

1363 Words3 Pages
bulb-icon

Recommended: Electric motors advantages and disadvantages

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...

... middle of paper ...

...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

Show More
Related

  • History's Forgotten Genius

    1127 Words  | 3 Pages

    Tesla’s career as an inventor started when he was in his late twenties. He displayed his incredible understanding of electricity and physics when he created his first invention, the induction motor. The induction motor is a small, electric motor that has become a very useful machine. In fact, most household appliances run using Tesla’s induction motor (Vujovic 1). Score one for Tesla. Soon after he invented the induction motor, Tesla moved to America to try his luck at living the American dream. While in New York City, Tesla got the amazing opportunity to work for his hero, Thomas Edison. However, Tesla soon quit working for Edison due to some disagreements between the two inventors. And so with Edison and his men biting at Tesla’s heels, Nikola set out on his own to make a name for himself (Vujovic 1). Tesla soon became Edison’s greatest competitor. While tinkering in his lab with one of his inventions called the Tesla Coil, Tesla discovered that he could send and receive radio signals when his coils were tuned to the exact same frequency...

    Read More

  • Michael Faraday

    847 Words  | 2 Pages

    Although Faraday was unsuccessful when it came to money, he was very successful in the field of science, namely electric science. One of his most important discoveries is that of electro-magnetic induction. It was this experiment, and others of the like, that brought about the discoveries of Maxwell, Rutherford, and Einstein, and elevated Faraday from the son of a poor blacksmith, to a great man of modern science.

    Read More

  • Specialties within Radiology

    893 Words  | 2 Pages

    Radiology is one of the few so-called “physical-science”-based fields of medicine, making it a challenging and rewarding application of an academic interest in science. It combines advanced knowledge of human physiology with principles of atomic physics and nuclear decay, electricity and magnetism, and both organic and inorg...

    Read More

  • Rabies And Anthrax Vaccines

    1012 Words  | 3 Pages

    ...late 17th century, and beginning of the 18th century, transportation was favored by American society so much, the wealthier would hire chauffer’s to take people places. So not only did the motor produce a better and more efficient life style, it also created a huge business industry, as we know it today called, “valeting”. The actual motor worked like this. “Two cups filled with mercury would contain a magnet and a wire with one being fixed and the other free to move. Whenever a current was passed through the wire, the free moving magnet or wire would revolve around its fixed partner due to the electromagnet forces being produced.” (History of Innovation). This first motor was a prime example of the fact that movement could be created by electricity and electricity could be created by friction. This motor was the most useful and applicable invention in the 1800’s.

    Read More

  • Computed Tomography and Radionuclide Imaging

    991 Words  | 2 Pages

    Computed tomography (CT) and Radionuclide imaging (RNI) are both a form of diagnostic imaging. Since they have been first introduced in medical imaging they both suffered a huge development over the years in terms of image acquisition and also patient radiation protection. The following essay it is going to focus on just a few important things that make CT and RNI similar and different in the same time. However this subject can be discussed in much depth, the focus is going to be on the similarities and differences of the physics imaging methods and also a small awareness of biological effects and radiation protection.

    Read More

  • The Tesla Coil: A Comparison: The System Of Electrical Circuits

    710 Words  | 2 Pages

    The Tesla coil is an electrical circuit made of the resonant transformer and developed by the famous inventor Nikola Tesla around 1891 as a power supply for his "System of Electric Lighting". The project mentioned above was designed to produce a current that alternates with high frequency, low-current and high voltage. Tesla experimented with a number of different configurations consisting of two, or sometimes three, coupled resonant electric circuits.

    Read More

  • Radioisotopes and their Medical Uses

    892 Words  | 2 Pages

    Radioisotopes have helped create advanced imaging techniques. Beforehand, X rays could only provide so much information such as broken bones, abnormal growths, and locating foreign objects in the body. Now it is possible to obtain much more information from medical imaging. Not only can this advanced imaging give imaging of tiny structures in the body, but it can also provide details such as cancerous cells and damaged heart tissue from a heart...

    Read More

  • Biography of Thomas Edison

    1357 Words  | 3 Pages

    Thomas Alva Edison is one of the most famous inventors. He saw many changes take place in his lifetime. His inventions were responsible for many of those changes. Some of his inventions were the telephone, the light bulb, the movie projector, and the phonograph. These inventions contributed to modern day, lights, movies, telephones, records and CDs. When Edison was born, there was no such thing as electricity, but by the time he died entire cities were lit by electricity (www.minot.k12.nd.us/edison.html).

    Read More

  • Electrical Engineering

    809 Words  | 2 Pages

    As a graduate student, I will undertake research and coursework in Electrical Engineering to enhance my competencies in this field. I intend to complete my master's degree in order to pursue my doctorate. The research that I am most interested in pursuing at Northeastern University surrounds the optical properties of MEMS devices, and the development of substrate-based fast electro-optical interfaces. My interest in this area stems from my undergraduate study in MEMs development for tri-axial accelerometers.

    Read More

  • Electrical Engineering

    1912 Words  | 4 Pages

    Electrical Engineers research, develop, design, and test electronic components, products, and systems for commercial, industrial, medical, military, and scientific applications (Cosgrove 749). They are concerned with devices that use small amounts of electricity that make up electronic components such as integrated circuits and microprocessors. By applying principles and techniques of electronic engineering they design, develop, and manufacture products such as computers, telephones, radios, and stereo systems (EGOE, 121). Electrical engineers touch everyone lives through the things they have designed or created. Electrical engineers have invented the lights in your house, the television, the stereo, the telephone, computers, and even your doctor’s blood pressure gauge (Stine 300).

    Read More

  • Electromagnetic Induction

    2435 Words  | 5 Pages

    The phenomenon called electromagnetic induction was first noticed and investigated by Michael Faraday, in 1831. Electromagnetic induction is the production of an electromotive force (emf) in a conductor as a result of a changing magnetic field about the conductor and is a very important concept. Faraday discovered that, whenever the magnetic field about an electromagnet was made to grow and collapse by closing and opening the electric circuit of which it was a part, an electric current could be detected in a separate conductor nearby. Faraday also investigated the possibility that a current could be produced by a magnetic field being placed near a coiled wire. Just placing the magnet near the wire could not produce a current. Faraday discovered that a current could be produced in this situation only if the magnet had some velocity. The magnet could be moved in either a positive or negative direction but had to be in motion to produce any current in the wire. The current in the coil is called an induced current, because the current is brought about (or “induced”) by a changing magnetic field (Cutnell and Johnson 705). The induced current is sustained by an emf. Since a source of emf is always needed to produce a current, the coil itself behaves as if it were a source of emf. The emf is known as an induced emf. Thus, a changing magnetic field induces an emf in the coil, and the emf leads to an induced current (705). He also found that moving a conductor near a stationary permanent magnet caused a current to flow in the wire as long as it was moving as in the magnet and coiled wire set-up.

    Read More

  • Discovery Of Electricity Essay

    516 Words  | 2 Pages

    Humans these days take electricity for granted. We don’t truly understand what life was like without it. Most young adults will tell you their life does not depend on electricity, but they aren’t fooling anyone. They all know that their life depends on electricity; whether it’s television, their phone, Google, or the lights in their house. We need to stop taking those things for granted and give credit where credit is due. That is why I chose to write about the scientists who contributed to the discovery of electricity, which then helped modern scientists fuel the electricity phenomenons we now have today.

    Read More

  • Michael Faraday

    551 Words  | 2 Pages

    In 1831, using his "induction ring", Faraday made one of his greatest discoveries - electromagnetic induction: the "induction" or generation of electricity in a wire by means of the electromagnetic effect of a current in another wire. The induction ring was the first electric transformer. In a second series of experiments in September he discovered magneto-electric induction: the production of a steady electric current. To do this, Faraday attached two wires through a sliding contact to a copper disc. By rotating the disc between the poles of a horseshoe magnet he obtained a continuous direct current. This was the first generator. From his experiments came devices that led to the modern electric motor, generator and transformer.

    Read More

  • Electricity

    911 Words  | 2 Pages

    The effects of electricity control much of our daily lives. Many of our gadgets and everyday tasks are run by this wonderful source of power. For example without electricity we would not be able to make a cup of coffee in the mourning, or even make a long distance call to family or friends. There have been several technological breakthroughs by many brilliant people throughout history regarding electricity. It has come from being discovered as a small current to being transformed into useful power to run such things as computers. Ben Franklin, Guglielmo Marconi, Thomas Edison, Paul Nipkow, and Charles Babbage have all contributed to the advancement of electricity, and all of their advancements have supplied society in many ways.

    Read More

  • Uses of Magnets in Everyday Life

    889 Words  | 2 Pages

    ...placing a soft metal core (commonly an iron alloy) inside a coil of wire through which electric current passes in order to produce a magnetic field. The strength and polarity of the magnetic field changes depending on the magnitude of the current flowing through the wire and the direction of the current flow. While there is sufficient flow of current, the core behaves like a magnet; however, as soon as the current stops, the magnetic properties also disappear. Modern devices that make use of electromagnets are the televisions, telephones, computers and electric motors.

    Read More

More about Electromagnetic Induction

Open Document