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Applications of Electromagnetism

            
             Magnetic and electric fields are some of the most interesting concepts found on the earth. The interplay between these two things is one of the reasons that magnetic and electric fields are used for many things from powering motors to recording sound and information. Electromagnetism is also widely used in a hospital's equipment and is vital for the survival of many people everyday. Electromagnetism is essential to so many functions of our everyday lives and to many industries livelihoods; it is now hard to think what life would be like without these forces.
             One of the most common uses of the properties of electromagnetism is in common speakers. In a speaker there are a few main parts including a cone, a voice coil, and a permanent magnet. The ends of the voice coil are connected to the back of a panel receiver or stereo and the receiver sends a signal through the voice coil which interacts with the magnetic field of the magnet which produces an alternating force that pushes and pulls on the cone. This pushing and pulling creates sound waves.
             Some of the more significant uses of electromagnetism are such as in magnetic resonance imaging or MRI's. when a patient receives and MRI he/she is put into a large tube which is like a giant solenoid with super conducting wire and produces a very powerful magnetic field. In this field, atoms of some molecules in the body can be made to give off small radio like transmissions. The strength of the magnetic field inside the solenoid can be varied in order to detect different molecules in different parts of the body as well. With this, it is possible to produce a computer generated resonance image. These pictures can help doctors to come up with images that can accompany those that would be produced y an X-Ray.
             Television screens and computer monitors use solenoids to produce images by exerting magnetic forces on moving electrons also. In a television there is an electron gun that fires a narrow beam of electrons at the screen of a tube.


Essays Related to Applications of Electromagnetism

1. Electromagnetic Spectrum

Electromagnetic Spectrum The electromagnetic spectrum is made up of six different types of waves. ... The electromagnetic field was found in the 19th centuries. ... Infrared has many applications in medicine or finding heat leaks in houses. ... Gamma rays are used in many medical applications such as taking pictures of bone structure slightly deeper than an x-ray would go. ... All the electromagnetic waves need no material for transmission. ...

  • Word Count: 1970
  • Approx Pages: 8
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2. Imaginary Numbers and The Microwave Oven

The strength of an electromagnetic field is one example. ... This pair of real numbers can be thought of as a complex number, and it turns out that the rule of multiplication of complex numbers is pertinent to the physics of an electromagnetic field. Although direct applications of complex numbers to the real world are small, their indirect applications are many. ... The energy entering the box was unable to escape, thereby creating a higher density electromagnetic field. ... Spencer used the complex number system to quantify the electric and magnetic components in the electromagnetic field...

  • Word Count: 546
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3. Solar radiation spectrum and colar of light

Infrared describes the part of the electromagnetic spectrum with wavelengths between 700nm and 1mm. Infrared light has many technology and physics applications. ... Light and Electromagnetic Radiation Light is an integral part of our lives. ... the electromagnetic spectrum of importance in the Earth's atmosphere The solar radiation spectrum The electromagnetic radiation emitted by the sun shows a wide range of wavelengths. ... The visible light region occupies a very small portion of the electromagnetic spectrum. ...

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4. Linear Accelerators

The particles in these energy ranges have extremely useful applications in the scientific, industrial, medical and military fields. The medical applications are the most important. There are the abilities to produce radioisotopes for medical applications, radiation effects for cancer therapy, and thermal and energetic neutron beams for other various medical applications. ... In the scientific field of research there is the ability to study special types of light and electromagnetic radiation for solid-state physics applications and energetic particle beams for elementary particle physics re...

  • Word Count: 388
  • Approx Pages: 2
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5. MEMS SENSOR FOR SPACE APPLICATIONS

MEMS sensors are beginning to intrude into every aspect of technology, particularly those that are related to space applications. Micro sensors can detect changes in a system's environment by measuring the magnetic, chemical, thermal, mechanical or electromagnetic information whereby it then relates this information to the micro actuator which will then react and create some form of changes to the environment. The inputs (sensors) and outputs (controllers) serve as the bottlenecks that limit many everyday technology applications, particularly applications where dense nets of information o...

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6. Fiber optics

Electromagnetic Interference is a common type of noise that originates with one of the basic properties of electromagnetism. ... Electromagnetic Interference does occur in coaxial cables, since current does cut across the conductor. ... There are no radiated magnetic fields around optical fibers; the electromagnetic fields are confined within the fiber. ... Since fiber optics do not radiate electromagnetic energy, emissions cannot be intercepted and physically tapping the fiber takes great skill to do undetected. ... These kinds of cables are economical and standard for many indoor application...

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7. wireless technology

Configurations can be changed to meet specific needs regarding installations and applications used. ... Real World Applications Wireless LANs usually are additions to wired LANs and add flexibility to existing LANs making a wide range of applications available. ... How Wireless LANs Work Wireless LANs use electromagnetic airwaves to exchange information between a wireless device and the LAN. ...

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8. Imaginary Numbers

Since numerous applications are based on polynomial models in theory, complex numbers play a part in all of these. ... Another use of imaginary numbers is measuring the strength of an electromagnetic field. ... This pair of real numbers can be thought of as a complex number, and it turns out that the strange rule of multiplication of complex numbers has relevance to the physics of an electromagnetic field. ...

  • Word Count: 502
  • Approx Pages: 2
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