The Influence Of Electromagnetic Shielding Elements

Without withstanding as Sophocles said “ the only crime is pride” is important for us not to ignore some important cause of sparks in our microwaves; a piece of metal forgotten in a microwave is enough to cause a spark, this is also the same with the use of foil covering as many who have tried using it will agree with me they experienced a spark of fire burnt.

Insulation slows the process of heat leaving an object. Most insulation contains lots of air spaces. The air spaces slow the flow of heat leaving the object because the heat takes longer to travel through the air spaces. Insulation is a material or substance that is used to stop heat, electricity, or sound from going into or out of something (Insulation, 2015, pg. 1). Insulation is commonly thought of in

Insulator – Do not allow electric charges to pass through them. Electrons in the atoms and molecules move very slightly to one side of the object but are not released.

Briefly describe the layered construction of a coaxial cable from the inner core to the outer insulation. Use your textbook and Internet research to compose your answer.

EMC regulations governing electromagnetic radiation, to ensure that equipment do not emit electromagnetic radiation that could

As I rotated through computed tomography (CT), I noted that radiologic technologists do not utilize in-plane shields as they do in radiography. Because shielding is emphasized so much in radiography, and because computed tomography is based on the same physics, I wondered why a technologist could not shield the areas that were not of interest. When I asked, some would say that they do not shield because streaking would show on the image and it would mess up their machine. Others told me that shields actually increase dose to the patient. A few technologists mentioned that shielding has to be done correctly, but it can be done. How can so many people not be in agreement about a principle that is fundamental to their work? How can shielding a patient in CT be any different than shielding in radiography? I was determined to find a conclusive reason for shielding in every CT exam.

Copper is used in various industries including: Building Industry – 47%, Transportation – 10%, Consumer Products – 11%, Electronic Products – 23% and Industrial Machines – 9%. Copper is an extremely good conductor, which is why it is produced and used in forms of copper wire, cabling, generators, motors and various other appliances. Copper’s resistance to corrosion means it can be used in areas containing moisture such as water piping and tanks, plumbing, and also in hot water systems which is effective due to its suitable heat conduction. It is easy to form shapes such as pipes with copper due to its malleability. Copper also has the ability to lose heat very quickly, which makes it an effective element to be used in air conditioning and heat exchangers.

There are 3 types of metals for electricity conducting: metallic conductor, semiconductor, and superconductor. Metallic conductors allow the free flow of ions and electrons through a sample; and its conductivity decreases as the temperature increases.

Shielding is important because we, as radiographers, need to protect our patients from unnecessary radiation. Shielding our patients is our duty. A majority of the patients we see are unaware of the effects that radiation can cause, while some are more educated and are aware that they should be shielded during exposure to x-rays. We should be shielding every patient if we are able to, especially the gonadal area and breast area of people in the reproductive age. If a patient is pregnant, but desperately needs the exam, we need to make sure we are shielding as best as possible to prevent the exposure from reaching the fetus, which could potentially cause developmental effects depending on what stage of development the fetus is in.

"when it was reported that hordes of children died from cancer In 1979, resided more often in homes thought of being exposed to higher EMF than what healthy control children did"(4); cancer was associated with exposure to electromagnetic fields (EMF) for a long time. The risks were recorded as high as 2.2 for all cancers, 2.4 for brain cancer and 3.0 for leukemia.

I am writing about bulletproof clothing and how it is made. I’m going to explain all the details about it and the history of it. By the end of this paper you should know everything about bulletproof clothing.

The Drude model can explain the Thermal Conductivity in metals and Electrical Conductivity of metals.

In the early 1900's a duch physicist by the name of Heike Kammerlingh Onnes (pictured above), discovered superconductivity. Before his discovery, Onnes had spent most of his scientific career studying extreme cold. The first step he took toward superconductivity was on July 10, 1908 when he liquified helium and cooled it to an astonishing 4 K, which is roughly the temperature of the background radiation in open space. Using this liquid helium, Onnes began experimenting with other materials and their properties when subjected to intense cold. In 1911, he began his research on the electrical properties of these same materials. It was known to Onnes that as materials, particularly metals, cooled, they exhibited less and less resistance. Bringing a mercury wire to as close to absolute zero as possible, Onnes observed that as the temperature dropped, so to did the resistance, until 4.2 K was reached. There resistance vanished and current flowed through the wire unhindered. Below is an approximate graph displaying resistance as a function of temperature for the experiment Onnes conducted with mercury:

Overall, the experiment succeeded that the metals show the theoretical properties. Differences existed in the mathematical calculation of the actual length. These differences, however, it can be accounted for by experimental error; more over there are uncertainty on purity of the

Now we will move onto other materials that are involved with electronics. The next group of materials that will be discussed are insulators. An insulator is a material that does not conduct electricity at all but will resist or stop it from traveling further. An insulating atom has eight electrons in its valance shell which makes this shell complete. Eight is the most electrons that any atoms can have in their valance shell this is why these are called insulators, no more electrons can fit in the valance shell of these atoms.