Monday, November 2, 2009

Incredible physical: Michael Faraday

Henry Toro De León

Michael Faraday, (22 September 1791 – 25 August 1867) born in England, was one of the most important physicists of our contemporary era, this contributed to the field of electromagnetism and electrochemistry. Faraday studied the magnetic field around a conductor ( the conductor is the name for materials what having the capacity to carrying electricity) carrying a DC electric current, the study of magnetic field is important because this concept is use un many electronics devices, example: the alternator of our cars etc... He established the basis for the electromagnetic field concept in physics. He discovered the induction of electric current in a circuit and others electronics devices. He worked in diamagnetism (this concept is referred to the opposite to ferromagnetism), and laws of electrolysis. He discovered the effect of magnetism in rays of light and the relationship between the two phenomena. His inventions of electromagnetic devices formed the foundation of electric motor technology example the alternator in our cars and the starter, and it was largely due to his efforts that electricity became viable for use in technology. Faraday is most important person for his work with electricity and magnetism. In the first Faraday’s experiment he recorded the construction of a voltaic pile with seven halfpence pieces, stacked together with seven disks of sheet zinc, and six pieces of paper moistened with salt water. With this pile he decomposed sulphate of magnesia, soon after the Danish physicist and chemist; Hans Christian Ørsted discovered the phenomenon of electromagnetism. Faraday, having discussed the problem with the two men, went on to build two devices to produce what he called “electromagnetic rotation”: a continuous circular motion from the circular magnetic force around a wire and a wire extending into a pool of mercury with a magnet placed inside would rotate around the magnet if supplied with current from a chemical battery, this experiment was very important because it opened the doors for covert chemistry energy(work) in electric energy or electric work. The latter device is known as a polar motor. These inventions form the foundation of modern electromagnetic technology, this concept (modern electric technology is used in the industry, in our cars and in the electronic devices like a stove. In his excitement, Faraday was brave and strong man, because he published results without acknowledging his work with either comments of: Wollaston or Davy. Faraday continued his laboratory work exploring properties of materials and developing the requisite experience. Faraday briefly set up a circuit to study whether a magnetic field could regulate the flow, (this flow of current is just for enclosed areas) of a current in an adjacent wire, but could find no such relationship. This lab followed similar work with light and magnets three years earlier with identical results. During the next seven years, Faraday spent much of his time perfecting his recipe for optical quality (heavy) glass, which he used in his future studies connecting light with magnetism. In his spare time from this optics work, Faraday continued publishing his experimental work and conducted foreign correspondence with scientists he previously met on his journeys about Europe with Davy. When Davy passed away, Faraday began his great series of experiments in which he discovered electromagnetic induction. Joseph Henry likely discovered self-induction (this concept is referred to the property of self-inductance is a particular form of electromagnetic induction. Self inductance is defined as the induction of a voltage in a current-carrying wire when the current in the wire itself is changing. In the case of self-inductance, the magnetic field created by a changing current in the circuit itself induces a voltage in the same circuit. Therefore, the voltage is self-induced).A few months earlier Faraday used the principle to construct the electric dynamo, the ancestor of modern power generators. He completed a series of experiments aimed at investigating the fundamental nature of electricity. Faraday used "static", batteries, and "animal electricity" to produce the phenomena of electrostatic attraction, electrolysis, magnetism, etc. He concluded that, contrary to scientific opinion of the time, the divisions between the various "kinds" of electricity were illusory. Faraday instead proposed that only single "electricity" exists, and the changing values of quantity and intensity (current and voltage) would produce different groups of forms. Near the end of his career Faraday proposed that electromagnetic forces extended into the empty space around the conductor. This idea was rejected by his fellow scientists, and Faraday did not live to see this idea eventually accepted. Faraday's concept of lines of flux emanating from charged bodies and magnets provided a way to visualise electric and magnetic fields. Faraday, in my opinion, was one of the most important physics in our era, because without him the study of electrostatic or a different kind of electricity would not exists as it is.


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