Energy And Electricity

Discussion in 'General Electronics Chat' started by steeve_wai, Nov 21, 2007.

  1. steeve_wai

    Thread Starter Active Member

    Sep 13, 2007
    ok here are some links from an old post...can any one tell me how energy transfers occur in a circuit...I ASK THIS AGAIN AND AGAIN BECAUSE THE EXPLANATIONS GIVEN SO FAR ARE ANYTHING BUT SATISFACTORY...
    do we need to discuss this in terms of the POYNTING VECTOR as the following link suggests...

    the author of the article says that many books (such as resncik and halliday)
    have oversimplified explantions of voltage,current etc which might seem to be "too simple"/"obvious".also, a link (probably from caltech) has similar comments regarding that book and has RECOMMENDED "electricity and magnetism" by edward m. purcell.can any of you give me information/reviews about this book.

    NEGATIVE RESISTANCE:can any one explain this?

    i have a link here but i could not understand anything...great! its the POYNTING VECTOR again...(so i'll have to go through all that first)

    please see this link too...i dont have the prerequiste mathematical and physics concepts to understand what is said here

    "A Visual Tour of what they don't want you to know about electrical circuits

    oh... how can i see all the posts,all at once, made by me till now.

    ok thanks for reading...
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    Why not simply read Purcell's book (from your local library) and form your own opinion?

    And stop wasting your time reading Bearden's dribble. He's a snake-oil salesman, a con-man, and a bald-faced liar.
  3. recca02

    Senior Member

    Apr 2, 2007
    i second that, anyone who thinks energy can be extracted out of nowhere is not to be taken seriously.
  4. bloguetronica

    AAC Fanatic!

    Apr 27, 2007
    Negative resistance? Or just a load of ...?

    To be continued...

    Now seriously, don't read those articles! They are absolutely not scientific and they are misleading.
  5. chesart1

    Senior Member

    Jan 23, 2006
    The medium of travel for electricity is the electron. Electrons rotates around the center of an atom. Electrons possess two kinds of energy: potential energy and kinetic energy.

    Potential energy is the energy possessed by electric charges by virtue of their position in an electrostatic field. A simplified explanation would be that potential energy is the energy required to keep an object at a certain height ... Or in other words, the energy required to resist the force of gravity.

    Kinetic energy is the energy of motion. An object which has motion - whether it be vertical or horizontal motion - has kinetic energy. There are many forms of kinetic energy - vibrational (the energy due to vibrational motion), rotational (the energy due to rotational motion), and translational (the energy due to motion from one location to another).

    Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms. Atoms are made of even smaller particles called electrons, protons, and neutrons. Each electron contains a negative electrical charge and each proton contains a positive electrical charge. Applying a force can make some of the electrons move.

    I suggest that you visit the local library and search for the book that is right for you. There is a book you can purchase [on the internet] for as little as a few dollars and it has some good explanations without the complex mathematical equations. The risk, of course, is that the explanations may be more simple then you want. Here is the link to the that book: Understanding Physics (Science): Books: Isaac Asimov

  6. chesart1

    Senior Member

    Jan 23, 2006
    A component has negative resistance if the resistance is inversely proportional to the voltage and directly proportional to the current. Note that this is the inverse on ohm's law. To fully understand this phenomenum, you have to study semiconductors [in electronics].
  7. GS3

    AAC Fanatic!

    Sep 21, 2007