NATIONAL UNIVERSITY OPEN AND DISTANCE QUESTIONS.docx

NATIONAL UNIVERSITY OPEN AND DISTANCE QUESTIONS.docx -...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
NATIONAL UNIVERSITY OPEN AND DISTANCE UNIT 1. INDIVIDUAL ACTIVITY ELECTROMAGNETIC THEORY AND WAVES Group: 203058ª_471 WORK PRESENTED BY: OMAR JAVIER ORDOÑEZ GARCIA TUTOR: WILMER HERNAN GUTIERREZ BASIC SCIENCE SCHOOL TECHNOLOGY AND ENGINEERING ECBTI
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Explain the practical application of the loss tangent with an example The type of medium can be determined by the tangent of losses because it is a measure of the quality of an insulation, the lower the conduction current compared to the displacement current, the better the quality of the electrical insulation. The classification of the media can be established taking into account that the greater the angle of losses, the greater the current component will be compared to the displacement current, that is, the conductor will be the medium. What type of information gives us the propagation speed in the propagation of electromagnetic waves? Can we say that the propagation speed is proportional to the frequency of the signal? Rta \ In the practical sense, the speed of propagation of a wave, allows to know the direction, module and direction of it. The speed of propagation is the distance that a wave advances in a given time. To determine it, the following formula is used: V = λ * f Where: V = Speed of propagation λ = Wavelength (m) f = Frequency (Hz)
Image of page 2
In the case of electromagnetic waves when they propagate in a vacuum, they have a constant speed of 299,792,458 km / s Speaking of proportionality between the velocity of propagation and the frequency of the signal, Yes a wave of wavelength L and frequency 2U will move twice as fast as a wave of length L but of frequency U. In short, it depends on the frequency propagation speed . -Explain how an electromagnetic wave behaves in free space, perfect dielectrics and good conductors. Electromagnetic waves are not only used in our technological civilization, but are in the very essence of Nature. Everything we know exists with electromagnetic waves. The warm light that enters innocently in our room during a cold winter morning, fills the environment with a complex network of electromagnetic fields rapidly oscillating everywhere around us. First of all, electromagnetic phenomena have always intervened in the formation and evolution of the Universe (which would be about 13700 million years old, according to the "Big Bang" Theory), and in particular of the Earth (which would be 4540 million years old). ). Secondly, through the electromagnetic waves we get the luminous energy of the Sun (mainly IR, VIS and UV), which has always influenced the creation and evolution of Life on Earth (that is, for more than 3500 millions of years). Third, on Earth there can be Astronomy and Radioastronomy thanks to the arrival of electromagnetic waves coming from the events and objects of the Cosmos to which we belong.
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern