'Current' vs. electron flow

Discussion in 'Amp Central Station' started by King Fan, Nov 7, 2019 at 10:16 AM.

  1. King Fan

    King Fan Friend of Leo's

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    This is NOT a poll, and not an argument thread. Put down that rock. :)

    I know supple minds can work it either way, and the rest of us will be fine as long as we use a consistent definition (and recall others may use the other). But I thought folks here might like this, borrowed from the internet...

    [​IMG]
     
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  2. Verne Bunsen

    Verne Bunsen Tele-Afflicted

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    I love XKCD, one of the best things on the internets.
     
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  3. Mexitele Blues

    Mexitele Blues Tele-Holic

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    Holy cow, you posted an XKCD before I replied to you with the hyphen comic? Whoa.
     
  4. J-Flanders

    J-Flanders Tele-Meister

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    Sorry, but the title is kinda wrong. :)

    Any of the ones below would have been 'correct', but leaving out the most important word (conventional), misses the point...

    Conventional vs Electron Flow
    Conventional Flow vs Electron Flow
    Conventional vs Electron Current
    Conventional Current vs Electron Current
    Conventional Current vs Electron Flow
    Conventional Flow vs Electron Current
     
  5. pdmartin

    pdmartin Tele-Meister

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    Doesn’t matter - it’s all just smoke. What happens when a component catastrophically fails? All the “electricity“ (smoke) visibly escapes into the air. I’ve observed it many times.



    People are shocked when they find out I’m not a good electrician.
     
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  6. King Fan

    King Fan Friend of Leo's

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    "Use the Force, Luke..." :D
     
  7. King Fan

    King Fan Friend of Leo's

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    Double post
     
    Last edited: Nov 7, 2019 at 8:01 PM
  8. DugT

    DugT Tele-Holic

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    This reminds me of a funny question I read today on Amazon about a 5 horsepower shop vac.

    "This doesn't make sense. How can it be 5 HP since W = Volts x amps and it is 10 amps?
     
  9. J-Flanders

    J-Flanders Tele-Meister

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    You are probably '*correct*'. :)
    Are you being ironic about the "'so called'"?
    My avatar?
     
  10. archtop_fjk

    archtop_fjk Tele-Holic

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    This is how electric current flows...

    [​IMG]
     
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  11. keithb7

    keithb7 Friend of Leo's

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    I have a car with a positive ground system! The engineer must have had BJ Franklin reach out in a dream.
     
  12. King Fan

    King Fan Friend of Leo's

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    That's no problem, Keith, as long as you keep a positive attitude.
     
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  13. Henry Mars

    Henry Mars Tele-Afflicted

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    It is all very simple ... pick which fairy tale you like and and believe it until the project is complete. The result will be the same.
     
  14. Dreadnut

    Dreadnut TDPRI Member

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    I learned about "letting the smoke out" in Navy avionics classes.

    The device operates as long as the magic smoke is trapped inside of it, but when the smoke escapes from it, the device ceases to operate. Ergo, the smoke is an essential part of the device and its operation, through undetermined ('magical') means
     
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  15. Commodore 64

    Commodore 64 Friend of Leo's

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    Merlin says current is a flux that exists when electrons flow.
     
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  16. King Fan

    King Fan Friend of Leo's

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    You are so right, and in fact they don't so much flow as sort of bump into the next atom while carrying charge, like a guy in a bucket brigade. The flow of charge is, I guess, flux? Both in theory and in practice 'charge carriers' may be positive (eg some semiconductors) or negative (metals / conductors).

    If all this gets too confusing, it helps to remember that, "Electric flux has SI units of volt metres (V m), or, equivalently, newton metres squared per coulomb (N m^2 C^(−1)). Thus, the SI base units of electric flux are kg·m^3·s^(−3)·A^(−1)."

    I just use rosin-core solder to make sure I have enough flux... :)
     
  17. jsnwhite619

    jsnwhite619 Friend of Leo's

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    My dad taught me everything he said I needed to know about electricity when I was a kid -- "You can't see it, and it will knock the $#!+ out of you." I have to say it was a good primer.

    Sent from my moto g(6) using Tapatalk
     
  18. Boubou

    Boubou Doctor of Teleocity Gold Supporter

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    It’s like a guitar neck, up is down and down is up
     
  19. King Fan

    King Fan Friend of Leo's

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    Hmm, instead of being clever, I shoulda been smart when our friend @Commodore 64 mentioned Merlin. I finally looked at what Merlin says, and it's revealing. Complicated, but also simplifying.

    "Strictly speaking, current does not have any direction in the usual sense because it is not a physical ‘stuff’ that moves around a circuit. Current is more properly defined as the rate of change of electric flux: i = dQ/dt, and is, therefore, an entirely mathematical concept. Current is a scalar quantity; it has no direction, only sign (positive or negative)."
     
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