Veritasium was wrong about energy being carried by the electromagnetic field part 2

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  • เผยแพร่เมื่อ 4 ก.ค. 2024
  • Veritasium is wrong about energy being transferred by the electromagnetic field. In this video I correct my error about the Poynting vector and show that energy is carried by the wires and not the fields. Force can be conveyed by a stationary field but energy can not. Only a changing field can carry energy. The frequency of electric and magnetic fields can vary from DC to daylight. At frequencies approaching zero Hz it becomes obvious that the wires carry the energy. High voltage DC transmission lines (HVDC) are used to minimize losses from the stray electromagnetic fields of AC transmission lines.
    Here is a link to my first video:
    • Veritasium is wrong ab...
    Here is a link to High Voltage DC transmission lines:
    • Nelson River: HVDC Tra...
    Here is a link to the original Veritasium video and other responses to it.
    • Poynting Vector
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ความคิดเห็น • 8

  • @markg1051
    @markg1051 2 ปีที่แล้ว

    Happy New Year Jim!
    I just rewatched this video and still can't see where you show that you've also been wrong, I guess I'll have to compare it to your 1st video for referrence.
    Take care.

  • @Ilove3SGTE
    @Ilove3SGTE 2 ปีที่แล้ว

    Nice work Jim, could you explain more about how the fields in DC work?

  • @BenjaminGatti
    @BenjaminGatti 2 ปีที่แล้ว

    You certainly said that the power moves through the wires more so than the fields per se, but there is a kind of an interesting wrinkle here which is Derek's example is specious largely because it deals only with the first 3.3 nanoseconds. So really the question becomes how much of the energy is moving through the wires in the first three point three nanoseconds, and here we can think of a frequency less transient, but the period is still 3.3 nanoseconds .
    I suspect what you'll find is that in a large enough piece of copper the current will induce any currents within the copper that will make the copper resistant to the flow of electrons, and push the active electrons to the outside of a copper wire, what's called the surface, and a thin layer near the surface will be the least impeded by the eddy currents and that is phenomena is to some extent what Derek is digging at, I'm not confident it's very meaningful, and it may not really be prevalent in a DC battery too light circuit.

  • @amunt3r
    @amunt3r 6 หลายเดือนก่อน

    You can watch this video comfortably at 1.5 x speed

  • @monrrous
    @monrrous ปีที่แล้ว

    Good stuff

    • @Jimscoolstuff
      @Jimscoolstuff  ปีที่แล้ว +1

      Thanks for your comment.

    • @monrrous
      @monrrous ปีที่แล้ว

      @@Jimscoolstuff thank you! im from barcelona, so i like your content and i learn english everytime i see quality content like you makes

    • @Jimscoolstuff
      @Jimscoolstuff  ปีที่แล้ว

      @@monrrous Thank You for your nice comment.