How to Demagnetize a Magnet

A magnet forms when the magnetic dipoles in a material orient in the same general direction. Iron and manganese are two elements that can be made into magnets by aligning the magnetic dipoles in the metal, otherwise these metals are not inherently magnetic. Other types of magnets exist, such as neodymium iron boron (NdFeB), samarium cobalt (SmCo), ceramic (ferrite) magnets, and aluminum nickel cobalt (AlNiCo) magnets. These materials are called permanent magnets, but there are ways to demagnetize them. Basically, its a matter of randomizing the orientation of the magnetic dipole. Heres what you do: Key Takeaways: Demagnetization Demagnetization randomizes the orientation of magnetic dipoles.Demagnetization processes include heating past the Curie point, applying a strong magnetic field, applying alternating current, or hammering the metal.Demagnetization occurs naturally over time. The speed of the process depends on the material, the temperature, and other factors.While demagnetization may occur by accident, it is often performed intentionally when metal parts become magnetized or in order to destroy magnetic-encoded data. Demagnetize a Magnet by Heating or Hammering If you heat a magnet past the temperature called the Curie point, the energy will free the magnetic dipoles from their ordered orientation. The long-range order is destroyed and the material will have little to no magnetization. The temperature required to achieve the effect is a physical property of the particular material. You can get the same effect by repeatedly hammering a magnet, applying pressure, or dropping it on a hard surface. The physical disruption and vibration shake the order out of the material, demagnetizing it. Self Demagnetization Over time, most magnets naturally lose strength as long range ordering is reduced. Some magnets dont last very long, while natural demagnetization is an extremely slow process for others. If you store a bunch of magnets together or randomly rub magnets against each other, each will affect the other, changing the orientation of the magnetic dipoles and lessening the net magnetic field strength. A strong magnet can be used to demagnetize a weaker that has a lower coercive field. Apply AC Current One way to make a magnet is by applying an electrical field (electromagnet), so it makes sense you can use alternating current to remove magnetism, too. To do this, you pass AC current through a solenoid. Start with a higher current and slowly reduce it until its zero. Alternating current rapidly switches directions, changing the orientation of the electromagnetic field. The magnetic dipoles try to orient according to the field, but since its changing, they end up randomized. The core of the material may retain a slight magnetic field due to hysteresis. Note you cant use DC current to achieve the same effect because this type of current only flows in one direction. Applying DC might not increase the strength of a magnet like you might expect, because its unlikely youll run the current through the material in the exact same direction as the orientation of the magnetic dipoles. You will change the orientation of some of the dipoles, but probably not all of them, unless you apply a strong enough current. A Magnetizer Demagnetizer tool is a device you can purchase which applies a strong enough field to change or neutralize a magnetic field. The tool is useful for magnetizing or demagnetizing iron and steel tools, which tend to retain their state unless disturbed. Why You Would Want to Demagnetize a Magnet You may be wondering why youd want to ruin a perfectly good magnet. The answer is that sometimes magnetization is undesirable. For example, if you have a magnetic tape drive or other data storage device and wish to dispose of it, you dont want just anyone to be able to access the data. Demagnetization is one way to remove the data and improve security. There are many situations in which metallic objects become magnetic and cause problems. In some cases, the problem is that the metal now attracts other metals to it, while in other cases, the magnetic field itself presents issues. Examples of materials that are commonly demagnetized include flatware, engine components, tools (although some are intentionally magnetized, like screwdriver bits), metal parts following machining or welding, and metal molds.

Essay on John Locke and the Enlightenment - 579 Words

This paper is about John Locke who was a philosopher in the 17-century. He was an Englishmen and his ideas formed the basic concept for the government and laws, which later allowed colonist to justify revolution. I agree with what Locke is saying because everybody should be able to have their own freedom and still respect the freedom of other people. John said, â€Å"Individuals have rights, and their duties are defined in terms of protecting their own rights and respecting those of others†. This paper will present to you information about his enlightenment, personal information, and how we as people feel about his decisions. The Enlightenment is a time in history when there was a want in greater knowledge or discovery. John had a†¦show more content†¦On August 29 1632 John Locke was born in a town named Wrington and lived in a small Somerset village. His mother died when John was at a very young age. His father was a country lawyer and died a couple years after h is mother. He went to Westminster in1646 and then Oxford in 1652. In 1666 John started practicing medicine on Lord Ashley. Ashley and Locke became known to become good friends. In 1668 Locke was elected to be in the Royal Society. The Royal Society was for improving natural knowledge. John did a lot of amazing things in his life time and he accomplished a lot and the one thing that influenced John the most was most likely to be that his parents died at a very young age and that usually has a great effect on children that can later lead into adult hood. John went into government when he became friends with the first earl, a high bishop noble, of Shaftesbury, where he defined natural rights as life, liberty, and property. When he defined the natural he affected Americas Founding Fathers. He wrote two major books to the government called First and Second Treatise. These books were written to defend the Glorious Revolution. In the second treatise he explained to them that men and wom en were free to pursue and defend their own interest. This led to a brutal war. Locke note that the only way out was to make a social compact. What it means is that people will have freedom to themselves with having a government and laws.Show MoreRelatedJohn Locke Enlightenment1191 Words   |  5 Pages The Enlightenment was a time of discovery and innovation, for political and personal philosophy. The main purpose of the enlightenment was to understand the world through different approaches this was a time where knowledge was learned and gained throughout this time especially through a philosopher called John Locke who had ideas on freedom of religion and the rights of citizens and also wrote two books in order to show his points those books are called â€Å"Two Treatises of Civil Government† and â€Å"AnRead MoreThe Enlightenment Theory Of John Locke1627 Words   |  7 PagesThe Enlightenment theory philosophies of John Locke offered a future that could drastically chang e government, economic and social ideals. Thomas Jefferson borrowed liberally from the enlightenment theory from John Locke, specifically focusing on Locks theories of the equality of men, natural rights, and that people should have a say on how the government treated people. Jefferson created a draft document created a bold experiment, America. The enlightenment philosophy of John Locke theorized thatRead MoreJohn Locke And The Enlightenment Era2187 Words   |  9 PagesThe Enlightenment Era was an era of brilliance skepticism and innovation for the world we humans live on. Ranging from Thomas Hobbes to Rousseau, the Enlightenment Era has revealed many brilliant minds, including the best philosopher of the said time, John Locke. A philosopher and a physician, John Locke was introducing ideas that to others, seemed ridiculous; however, these ideas and beliefs are the ideas that have led our society to the current state we live in. The influence and principles ofRead MoreThe Enlight enment By Thomas Paine And John Locke1709 Words   |  7 PagesFinal Paper: The Enlightenment The eighteenth century embraced the beginning of an opinionated movement for new thinking about once unquestioned truths and actions. This movement, known as the enlightenment was more than a period of advanced ideas, as this unfamiliar way of thinking also lead to a change in the way that people began to operate within society. The ambition was lead by the attempt to break free from the past, overturning old ideas and moving forward. Enlightenment thinkers helpedRead MoreThe Enlightenment Period : John Locke And Rousseau s Separation Of Powers1235 Words   |  5 PagesThe Enlightenment period, a time when reason was used to find out truths about human beings, took place from 1650-1800, during the eighteenth century. This time in history brought theories about scientific revolution, brought new ways of thinking amongst the people, and human reasoning brought questions of beliefs and ideas amongst society. The Enlightenment was a shift in time, a time where equality was to take stand , where people would be influenced to break away from their miseries. John LockeRead MoreClassical Liberalism And The Enlightenment1244 Words   |  5 PagesPaper #1: Classical Liberalism Classical liberalism is the transition from focusing on government to focusing on the rights of individuals. This transition came about during the time of the Enlightenment in the eighteenth century. The Enlightenment period was when man started to have more faith in his own reasoning. People began to look for evidence on their beliefs themselves and to find proof on these beliefs, so that they could come up with their own opinions on things. One way that they didRead MoreThomas Hobbes And The Enlightenment878 Words   |  4 Pagespeople who will help him govern. This is hard to imagine, but Enlightenment thinkers expressed their opinions on different questions related to this. The Enlightenment was an era from 1600 to 1800. It was a break from strictness of the Catholic Church and a period of intelligence and business growth in Europe. It grew out of the Renaissance, especially humanists. During this era, there were philosophers who were known as Enlightenment thinkers. They though t about two questions. First, are peopleRead MoreInfluence Of Enlightenment On The American Revolution898 Words   |  4 Pages The ideas of the Enlightenment influenced the American Revolution and the formation of the American Government in several different ways. The Enlightenment period initiated several new ideas about freedoms and rights. These ideas were discussed in meetings called salons in France, where they discussed new ideas. There were many influential philosophers from the enlightenment periods, Thomas Hobbes, Montesquieu, Adam Smith, Voltaire, John Locke, and Rousseau. Thomas Hobbes believed that all peopleRead MoreJohn Locke : The Most Influential Philosophical And Political Thinker917 Words   |  4 PagesThe Key to Locke John Locke â€Å"proved to be the most influential philosophical and political thinker of the seventeenth century† (Kagen 213). He lived in a period of great political change; Locke’s upbringing came to influence his philosophies, and these ideas had much significance in regards to the Enlightenment. Locke was born on August 29, 1632 in Wrington, Somerset (John Locke 9: 478). Early on came the outbreak of the English Civil War. Anglican and possessing Puritan sympathies, Locke’s father

Index Numbers of Commodity Prices and Industries Free Essays

Index Numbers of Commodity Prices and Industries In India index numbers are constructed for a wide range of economic subjects and their use is constantly increasing. The construction of index numbers started in India as early as the last quarter of 19th century. The main use of index numbers is to facilitate the assessment of average changes over the years with regard to wide range of economic activities. We will write a custom essay sample on Index Numbers of Commodity Prices and Industries or any similar topic only for you Order Now Many official and non-official agencies compile and publish index numbers of various kind. Index number of industrial production The Index Number of Industrial production was first compiled by the Office of the Economic Adviser to the Government of India with base 1937 = 100. The index has been revised from time to time with respect to the base year, the basis of weighing and the coverage of items. The current index number is with base 1970 = 100 and the items covered are divided into four groups, viz. , i. Basic industries, it. Capital goods industries, iii. Intermediate goods industries and ‘v. Consumer goods industries. Index numbers of commodity prices Index Number of commodity prices may be broadly classified as index number of wholesale prices and index number of retail prices. ) Index number of wholesale prices- The wholesale price index number are of two types: i. The general purpose index is constructed with a view to reflect the changes taking place in the general price level; hence it includes a large number of commodities. i’. A sensitive index on the other hand serves as an indicator of the movements of the general price levels and it includes only few important co mmodities which generally react quickly to the market trends. The current index number of wholesale prices has 1970-71 as the base year. (b) Index number of retail prices- The chief retail price index numbers ompiled in India are i. Labour bureau index number of retail prices for urban centres and it. Labour bureau index number of retail prices for rural centres. The Labour Bureau, Ministry of Labour, Government of India, compiles and publishes the index number of retail prices for 18 selected urban centres and 11 selected rural centres in various parts of the country on monthly basis. The index number initially had 1944 as the base. Now the construction of this index number is discontinued and it is replaced by simple price relatives of certain selected articles of consumption ith the calendar year 1960 as base year. c) Consumer price index numbers- The consumer price index number compiled and published by the Labour Bureau are important indicators of the changing economic situation in the country. At all India level three different series of consumer price index numbers are compiled. They are: i. Consumer price index of industrial workers, it. Consumer price index for non-manual employees and iii. Consumer pri ce index for agricultural labourers. http://classofl . com/homework-help/statistics-homework-help/ How to cite Index Numbers of Commodity Prices and Industries, Papers