An electromagnet is a magnet that is powered by electricity. Electromagnetism can be found in our daily lives. Driving to school or work? An electromagnet can be found in the cars’ engine. Hungry and want a snack? Electromagnets can be found in blenders, microwaves, ovens, toasters, toaster ovens, dishwashers, and electric can openers. Need to do your hair? Hair dryers, straighteners, and curling irons all have electromagnets in them. Electromagnets can also be found in junk yards on the cranes that pick up cars, electric bells, loudspeakers, tape recorders, VCRs, hard disks, particle accelerators, magnetic locks, drills, speakers, radios, microphones, doorbells, trains, generators, relays, and sorting out metal in junk yards. The electromagnet is a very useful item and can range too many different power levels. Electromagnetism is the magnetic force produced by an electric current. Electromagnetism is very useful, but also harmful.
Everything is made of matter, and matter is made of atoms. Inside and atoms nucleus, there are protons. Protons have a positive charge in them. Electrons can be found right outside of the nucleus and they hold a negative charge. As atoms’ electrons break free of the original atom, they jump to another atom to another. This jumping causes a flow of electricity. There approximately 121 protons per inch and 121 electrons per inch. When measuring the different kinds of electromagnetic units, you should use ampere (electric current), coulomb (electric charge), farad (capacitance), henry (inductance), ohm (resistance), volt (electric potential), and watt (power).
An electromagnet is made from a magnet, a battery, an iron core such as nail or bolt, coated copper wire, and wire strippers. You can make a si...
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...’ route, then it could put many lives in danger, but the train does have onboard batteries that will bring the train down to a slow stop. The cost of these giants is approximately $8.5 billion dollars. This is because new guideways would have to be built since the new technology cannot run on the old rails. Also, many people have concerns over snowstorms. Even if there was a layer of snow on the track, the train would be able to levitate right over it or the snow would be blown away due to the wind underneath the train. If there is enough snow that the Maglev trains cannot operate, then snow removers will come out and plow the snow off the tracks. Finally, since the Maglev trains are extremely heavy (the Transrapid TRO7 weighs in at 45 tons) they need an exceptionally strong electromagnetic field to match. This uses a lot of energy and that can get awfully expensive.
In the article,"Energy Story", it tells you all about basic energy and how scientists found out how it works. It tells you about each part of an electron and what part is what. The center is called the Nucleus. Electrons and atoms move together to create what is known as electricity. Atoms and electrons flow through an object
An atom, by definition, is the smallest part of any substance. The atom has three main components that make it up: protons, neutrons, and electrons. The protons and neutrons are within the nucleus in the center of the atom. The electrons revolve around the nucleus in many orbitals. These orbitals consist of many different shapes, including circular, spiral, and many others. Protons are positively charged and electrons are negatively charged. Protons and electrons both have charge of equal magnitude (i.e. 1.602x10-19 coulombs). Neutrons have a neutral charge, and they, along with protons, are the majority of mass in an atom. Electron mass, though, is negligible. When an atom has a neutral charge, it is stable.
Magnetism is very useful in our daily life. A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. In addition, magnetic field is a region which a magnetic material experiences a force as the result of the presence of a magnet or a current carrying conductor. Current carrying conductors also known as wire. As we know there have north pole and south pole of a magnet. If same pole of magnet approaches each other, there will repel each other. In contrast, if different pole of magnet approaches each other, they will attract. These are same with the electric charge, if same charge it will repel, different charge it will attract. Although magnets and magnetism were known much earlier, the study of magnetic fields began in 1269 when French scholar Petrus Peregrinus de Maricourt mapped out the magnetic field on the surface of a spherical magnet using iron needles [search from Wikipedia]. Noting that the resulting field lines crossed at two points he named those points 'poles' in analogy to Earth's poles. Each magnet has its own magnetic field which experiences a force as the result of the presence of a magnet and magnetic field has made up of magnetic field lines. The properties of magnetic field lines is it begin at the north pole and end at the south pole. The north pole always flow out while south pole always flow in. The closer the magnetic field lines, the strength of magnetic field increases. Furthermore, these line cannot cross each other. Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets. Ferromagnetic materials...
being picked up by the nail. The strength of an electromagnet can also be altered by varying the current or voltage. The more induced voltage, the stronger the electromagnet. An alternative way to strengthen an electromagnet is to replace the core with a "soft" iron. core. The.. Prediction: -.
Armature - Sometimes called a rotor. This is the part that spins. The armature can be either a permanent magnet or an electromagnet.
Tesla designed and invented the tesla coil in 1891. The tesla coil is used to transmit- high electricity and high frequency using the rotating magnetic field, and Alternating Current similar to the design he used for the rotating magnetic field. Tesla often experimented using two or sometimes three of the coils. He wanted to pursue these new devices to bring about innovations and discoveries. Tesla was also going to use them to help deliver free energy to the people. He envisioned and believed the Earth to be a big magnet of transmitting electricity. He thought the only thing missing from it was basically a receiver. But his tesla coils helped him bring about the invention of electrical lighting, his very used and widely-known x-ray, electrotherapy, and as I have previously stated, this was his first step at trying to receive energy from the earth. Today, the tesla coil is used for amusement and in some cases, they are used to identify leaks in a vacuum system. So how does the tesla coil work? They start off with a simple spark to set it off. Oscillators, I believe I mentioned them in the history of Tesla, they are basically used to help deliver an oscillating current. The oscillator helps the coils produce currents that can range anywhere from 50 kilovolts to several million volts of electricity. This is what your typical mad scientist use in things such as Frankenstein. Except for Tesla was a very real version of those mad scientists. The tesla coil also had a capacitor in it, they are used to store an electrical current that bursts out to help it create a stronger voltage. I have also read that there is something in it called a spark gap which is a switch in the coil to turn it on. Since I have let you know what the machine consists of, I will now discuss the operation cycle. First, the transformer sends high voltages up to the capacitor. There is something called a breakdown voltage there.
A magnet can be made from different materials, but loadstone is the natural form. The most important part of magnetism to make electric motors work is: A magnet has two different ends, or poles a north and a south pole. These poles behave like electric charges, like poles repel and unlike poles attract although magnets have no affect on still charges. The relationship between electricity and magnetism is that each phenomenon is that each generates a field. Electric fields can be pictured by thinking in terms of gravitational forces. Where, any two objects have a gravitational force one another. Any two electric charges have a force between them (either repelling, or attracting depending on polarity). These electric fiel...
The Electric Franklin. "Benjamin Franklin's Inventions." Ushistory.org. Independence Hall Association, 4 July 1995. Web. 23 May 2014.
Most objects are made of matter with equal amounts of positive and negative charge. Objects with the same # of positive and negative charges are electrically balanced, or neutral. Electric force is observed only when the balance of charge on objects is disturbed.
First off, what is current. Current is expressed in a unit called Amps. Amps are a measurement of how many electrons pass per second. That is to say, a wire with 40 coulombs passing any point in a 2 seconds would be said to have 20 Amps of current (40 Coulombs (a unit of charge given as 6.24x1018 electrons) / time in seconds or in this case, 2 seconds. The Amp is also known as Coulombs per second) Another trick about current is that it is measured in the movement of the positive charge. Literally that is to say the current moves in oppostion to the electrons. This is because originally it was thought that the positive charge is what moved, both are viable, but in reality a positive charge is generally fixed since within an atom the electrons are migratory, while the protons and neutrons tend to be stationary.
Magnets are stones that produce magnetic fields. The magnetic field is invisible, but is responsible for the most noticeable aspect of a magnet: the attraction of a metal object or the repulsion of another magnet. Magnets are used in common everyday household items: credit cards, TVs, speakers, motors, and compasses. A magnets strength is measured by its magnetic moment. (“Magnetism”)
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.
Faraday built two devices to produce what he called electromagnetic rotation: that is a continuous circular motion from the circular magnetic force around a wire. Ten years later, in 1831, he began his great series of experiments in which he discovered electromagnetic induction. These experiments form the basis of modern electromagnetic technology.
Usually magnetic fields are created when an electric current is applied to a set of conductive wires wound together (Dixon, 2001). Magnetic fields can also be created using Permanent Magnets (PM). Electrical motors can also work as electrical generators (Correla, 1986). Electrical generators are devices capable of converting mechanical energy into electrical energy. An example would be a wind turbine which works as an electrical generator.
...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.