Totally got it after watching this video. I didn't quite understand reading from my textbook or viewing other info. videos. Excellent work!!! Please keep it up!
Great explanation. An excellent example of a 10-15 min video explaining physical concepts - laid back attitude, a short historical background of the problem, repeating the most important ideas multiple times and keeping it to the point.
This video demonstrates the value of philosophy. Logical-philosophical thinking can help solve some of the biggest problems in science. The idea of an electric field is a great example of philosophical abductive reasoning or "inference to the best explanation". (1) We observed the phenomena of charges repelling each other. (2) We asked "How do charges exert a force on each other without coming in contact?" (3) We developed a hypothesis, "electric fields", which best explained the phenomena we observed. This hypothesis explains the phenomena well and works out with the math better than other possible hypotheses. As such, the electric field hypothesis will tentatively be thought of as "real" until something else explains the data within greater explanatory scope, explanatory power, and is less ad-hoc, etc.
I have a crush on your understanding of physics and your very facile way of explaining it. This made my day, it made me feel like there's still hope for the complex concepts I abhorred as a highschooler(and consequently dropped). Thank you so much for your hard work!
My guy I love you because I’ve been arguing with my teacher for 2 hours because he didn’t get my question and on my way home I watched your video then now I absolutely get the topic now
I have no physic background at all , but this short video helped me understand some important concept . Now I could much better understand quantum field , magnetic field and lots of other fields !
You literally hooked me the entire video and somehow answered every single question that came into my mind , If I got an A* I will be sure to write here , THANK YOUUUU
Brilliant and clear. Although one cannot help questionioning if the concept of fields used to explain force at a distance is just as arbitrary as the north and south poles definitions of a magnet, or wether ther are positive or negative charge carriers in electric current....
Thank you so much. This made me understand this concept like how I always want to. In high school teachers focus less on the understanding of the concept and more on formulas, and it freaks me out.
You could look at it as they do exert forces on each other...via electric fields. Same with physically pushing stuff. When you "touch" something, the atoms aren't actually touching each other; rather, the electric forces repel your hand. Most of any solid, liquid, or gas is composed of empty space.
What is the electric field? What is its nature? The classical electric and magnetic fields were first depicted as lines of force by Michael Faraday and later changed to tubes of force by Maxwell in the region surrounding stationary and moving charges. The abstract Electric and magnetic fields are suitably depicted using vector arrows at points in space. In order to precisely explain the physics of electricity and magnetism, it is useful to attribute a few properties to fields, which are abstract in the sense that they are not visible nor tangible but they produce observable effects in their interactions with matter and its constituent atoms and the charges which constitute them; one example is that they penetrate through matter. There are several more effects and properties of charges and fields which can explain their behavior in circuits. Electrostatics and circuits belong to one science and not two, that of electricity and magnetism. To know how they are unified visit this link matterandinteractions.org/articles-talks/ and view the article 'A unified treatment of electrostatics and circuits. B. Sherwood and R. Chabay, unpublished. (1999)' pdf. For a live demonstration of surface charge and its effects in circuits visit ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-U7RLg-691eQ.html For a detailed discussion of surface charge, coulomb's law, electric fields, fields of dipoles and other charge configurations, parallel plates, capacitance, currents, conservation of charge, conservation of current, superposition of fields, superposition of potential, simple dc circuit, magnetic fields, magnetic fields of a current element, straight wire, current loop, solenoids, biot-savart law, voltage, voltage source, difference between e.m.f. and potential difference, ideal voltage sources, resistors, how current branches in a parallel circuit, capacitors, inductors, faraday's law, inductance, ac circuits, transmission lines, motors, generators, p-n junction diodes, electromagnetic waves, antennas and radiation, see "Electric and Magnetic Interactions" by Chabay and Sherwood www.matterandinteractions.org or Fundamentals of electric theory and circuits by Sridhar Chitta www.wileyindia.com/fundamentals-of-electric-theory-and-circuits.html There is a "look inside" feature in the amazon.com webpage of the book "Fundamentals of electric theory and circuits" by Sridhar Chitta with a few pages of Chapter 1 which may be viewed and also which you may swipe left or press < icon to view the foreword, preface and Table of Contents. The contents of the above book by Sridhar Chitta, make a distinct unified approach to electrostatics and a few advanced circuits like coupling signals to amplifiers, lending precision and clarity to the topics which is not found in most text books. The book comes alongwith a CD with animated power point presentations for all chapters and voltage regulator, RC phase shift oscillators and differential amplifiers included additionally. For a lecture by Prof Ruth Chabay on surface charge in a simple dc circuit visit ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE--7W294N_Hkk.html
Question, @10:50 you reexplained what an electric field is saying its Force per Coulomb and that ratio stays the same no matter the charge there but isn't that misleading because the stronger the charge there the more force you feel? If I'm wrong can you please explain why?
The field generated by the first charge is measured in Force PER Coulomb (of the second charge). So yes, if your test charge is larger it will experience a larger force.
I still have a question that about how do charges produce electric field for opposite charges. You did explain how like charges repel each other but what about unlike charges. Do the charges produce different electric field for like and unlike charges?
En pocas palabras al rededor de una carga hay un campo magnetico que entre mas cerca mas fuerte, El campo magnetico no es una fuerza magnetica. Aunque el campo magnetico o electrico no sea una fuerza puede causar una fuerza en otra carga.
Nice, however I'm still confused on exactly HOW Q1 generates that force at a distance. Yes I see how you would measure that mathematically as you show, but how does it exactly do that? What is happening to transfer that electrical field to a force on Q2? Is it just an invisible thing we can't describe? I'm not sure I understand the mechanism on how the field changes to transfer a force from a distance. Are there other particles inbetween? Is it because it's really a wave and behaving as such?
theres still a question in my mind that is, what exactly will be the electric field without the participation of a positive test charge??...this q has been disturbing my mind...
I understand all the topics except the question? How do charge repel each other without toching each other, even electric field isn't enough to answer it, because it just saying that it indicates the amount of force per columb but it doesn't explain the answer of the mistry. How do charges get energy to repel or attract each other for unlimited time or how do charges create these forces without touching? Is there matter or something in the empty space which is transferring energy or creating force or sourcing the energy?
In the beginning of the video, you introduce the question of why forces can act at a distance, and claim that fields are the answer. I don't think that this answer suffices because fields don't seem to explain why these forces work, but instead provide another useful model for their behavior. Fields and forces seem to be models of a similar order, but a higher-order model is needed to answer the question posed.
Fields don't explain why electric forces can act at a distance. It is just a mathematical tool that produces correct predictions. Another mathematical tool is virtual photons which are probably also not real and therefore don't explain why.
