what are the application of electromagnetism?

Question

physics

Answer 1

Got a refrigerator in your house? It contains at least one motor. How about a microwave oven? Has a motor and a magnetron, as well as a relay to switch the high voltage to the magnetron. Television set? The electron beam is swept across the face of the CRT by magnetic fields. Electric clock? If it's mechanical, it has a motor; if it has a digital display, it contains a transformer. The outlets in your house are powered by a pole transformer nearby. That should give you the idea. And I haven't even mentioned cars and industrial processes.

Answer 2

Electromagnetism was a creation of the 19th century. It had an enormous impact on physics, overthrowing the mechanical theory of all physical phenomena which was dominant until the end of that century, and leading to the discovery of the electromagnetic nature of light, to special relativity and to much else. A study of the history of electromagnetism is not simply an opportunity to watch some of the greatest minds in physics at work - Ampère, Faraday, Maxwell, Kelvin and Lorentz, - it is also an opportunity to gain a better understanding of electromagnetism. The study of the evolution of a theory adds a dimension of understanding which is not easily provided by a physics textbook.



The course opens with a study of electricity and magnetism before the 19th century, mainly the achievements of William Gilbert, the founder of geomagnetism and electrostatics, and the discovery by Coulomb of the inverse-square laws of electrostatics and magnetism. Electromagnetism in the 19th century is divided into several main themes: The foundational period is represented by the discovery of electromagnetism by Oersted, and the creation of basic electromagnetic theory by Biot and Ampère. The first industrial application of electromagnetism lay in the development of the electrical telegraph industry. The great adventure here is the cooperation by scientists such as Kelvin with entrepreneurs in the successful laying of the first Atlantic telegraph cable Michael Faraday’s discovery of the first electric motor and of electromagnetic induction led to the foundation of ‘heavy’ electrical engineering. Faraday also introduced an exotic new concept to physics - that of the magnetic field. James Clerk Maxwell created advanced electromagnetic theory and famously discovered theoretically that light consists in electromagnetic waves. Maxwell interpreted Faraday’s theory in terms of motions in a material ether. These waves were actually discovered by Heinrich Hertz in 1887.



Another major development in late 19th century electromagnetism was the discovery of the electron by J J Thomson. This led to a new and more powerful interpretation of Maxwell’s equations by the Dutch physicist Hendrik Lorentz. It also led to the collapse of mechanical ether theories and to the brief reign of a totally electromagnetic theory of nature. The course concludes with a study of the Michelson-Morley experiment, and of the role of electromagnetism in formulating the theory of special relativity , developed chiefly by Einstein

Answer 3

The basic operation of the electric motor.

The term is expressed from a scientific point of view as EMF, Electro Magnetic Force.

Metal detectors use EMF transmitted thru a tuned coil and any metallic object that interrupts the emitted force field, will cause a tone and indicates the presence of coins or whatever.

Good question,

Darryl S.

Answer 4

Servos are electromagnets that switch poles back and foruth around a magnet, this causes the magnet to spin and this kinetic energy is transfered into whatever you need it to do.

I think it's servos, anyhow.

Answer 5

Levitation is one of the applications. Think of the Mag Lev trains they have in Japan.

Answer 6

moste of electromagnetic application is in telecomunication and electronical hardvares or factories to solve their problems?

Answer 7

Electric motors, generators, alternators, telephones, computers.

Answer 8

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