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Electromagnetic induction essay
Michael faraday research
Electromagnetic induction essay
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Research Paper: Faraday’s Discoveries: Michael Faraday was the man behind the discovery of electromagnetic induction. Electromagnetic induction is the creation of an electric current by using a magnetic field. Faraday’s first experiment was set up by coiling to separate lengths of copper wire around a wooden block. The two coils had to be separated he did this with thread. One of the coils was connected to a galvanometer (an instrument used to detect small electrical currents), while the second coil was connected to a battery and switch. As Faraday closed the switch there was a small and brief change in the reading on the galvanometer. What this meant was that Faraday had seen a little and concise current that passed through the galvanometer circuit. Faraday observed the same affect in the galvanometer circuit when the battery circuit was turned off, except the change was in the opposite direction or negative of the first reading of the galvanometer. The only problem with this experiment is that when the current passing through the battery circuit was at a continual rate there was...
was first conceived by Michael Faraday in the year 1832 in his Backerian Lecture to
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...
The major encounters that Tesla and Faraday faced included social, economic, intellectual barriers. Considering socially, Faraday was considered to be a “...high-priest of Nature, revealing the hidden forces...”(Shortland) People saw Faraday as the highest of his field, the one who was the closest to God in relation to understanding his creation. This also shows the social standard at this point in time, many going to church and understanding when someone references a religious point. Also, for social encounters, we have Tesla with his description f what the future will be like. This was not a reaction to the society that Tesla was around, but a prediction of what they were to become. Tesla, hoping to see that people would grow to become stronger
As James Levine is famous for saying, “I was lucky that I met the right mentors and teachers at the right moment.” To me, one of the greatest mentors of innovative scientific history was Nikola Tesla. That being said, if given the opportunity to spend the next year of my life in a different time period I would like to live during the year 1942 so I could work beside Tesla. This was the year before Tesla died, a time when he had experienced the full scope of his expertise and could impart that wisdom to me. My questions about his popularity would be answered in full. Questions about Tesla’s integrity could lead to the answer to the legendary disputes about what was rightfully his. Legends about genius inventions that could only be imagined
One thunderous afternoon on June 1752, Benjamin Franklin conducted what is known today as the “Kite Experiment”. He wanted to prove that if one object was electrical, the energy from that object could be transferred to another object, therefore being classified as electricity and lightning. With his son William, Ben took a string and attached the kite to it, then he attached an iron key to the kite. Next, they tied a thin metal wire from the key and put the wire inside a Leyden jar which stored all the electrical charge. His experiment profitably showed that his accusations were correct. Many other scientist tried the same experiment and were electrocuted, but Ben Franklin was the lucky one. He changed the world of science.
In 1837 Morse got two partners to help him develop his telegraph. One was Leonard Gale, a quiet professor of science at New York University who taught him how to increase voltage by increasing the number of turns around the electromagnet. The other was Alfred ...
The History of Magnets and Electromagents Magnets and electromagnets have many uses, every electric motor,
“I find out what the world needs. Then I go ahead and try to invent it (Sullivan 5).” These are the word that Thomas Alva Edison lived his life by. This is why he is known as the greatest inventor in Americas history. Thomas was granted 1093 patents over his life time. Some of the main inventions that changed the world are the electric light bulb, phonograph and movie camera and projector and much more(Jenkins 1). Thomas Edison is well known for his invention of electricity but he has made many more contributions to society.
The History of Electricity Luigi Galvani (1737-1798) was an Italian physician and physicist. He was one of the first to investigate the phenomenon of what came to be named as 'bioelectrogenesis'. Galvani reported a series of experiments he had been conducting since 1780 where fog's legs violently contracted if a metal scalpel accidentally touched a certain leg nerve during dissection. He showed that contractions occurred when the operator made contact with the nerve by means of an electric conductor connected to the ground, when the electrostatic machine was working or when there was a lighting strike in the vicinity. There were also produced if the frogs were placed on an iron plate while a brass hook simultaneously pressed against the iron.
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.
In 1819, a Danish physicist Hans Christian Oersted was setting up his materials for an experiment when he made a brilliant observation. He noticed that when a compass needle was brought close to a wire conducting an electric current, the n...
In 1750, Benjamin Franklin wanted to prove that lightning was caused by electricity. He tested his theory with an experiment in which he flew a kite with a metal key attached to it into a storm cloud. The historical facts are not clear as to if he actually carried out the experiment, which is why there is doubt that he is the discoverer of electricity. But, we still credit him with the idea. He also did other experiments concerning electricity, but others after him would have to ...
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.
Temperature has a large effect on particles. Heat makes particles energized causing them to spread out and bounce around. Inversely the cold causes particles to clump together and become denser. These changes greatly F magnetic the state of substances and can also influence the strength of magnetic fields. This is because it can alter the flow of electrons through the magnet.
...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.