MH's ideal coil and voltage question

[Magneticitist]

Electrons move at the speed of light even through resistors as far as I know.

Bill

That is where things get even more complicated and the atomic structure of conductors come into play. The EM waves can propagate at typically light speed, or just under, but the electron's have a
velocity we call the electron drift that is actually much much slower.


(in a way it's analogous to how slowly a magnet falls through the copper pipe demonstration)

[Pirate88179]

That is where things get even more complicated and the atomic structure of conductors come into play. The EM waves can propagate at typically light speed, or just under, but the electron's have a
velocity we call the electron drift that is actually much much slower.


(in a way it's analogous to how slowly a magnet falls through the copper pipe demonstration)

The magnet slowing through a copper pipe is a demonstration of Lenz Law due to the fact that copper can be diamagnetic.  Electrons move at the speed of light...you can limit the number of them moving through a circuit but not slow them down.

Bill

[Magneticitist]

The magnet slowing through a copper pipe is a demonstration of Lenz Law due to the fact that copper can be diamagnetic.  Electrons move at the speed of light...you can limit the number of them moving through a circuit but not slow them down.

Bill

It's definitely not something that can be so thoroughly explained in a short comment, but essentially this is true, electrons are traveling chaotically at near light speed. This is the Fermi velocity. But when we bring current flow into the equation the drift velocity of the electron particle through a conductor can become analogous to the magnet in the copper pipe, simply in the context of the magnet moving much much slower than you would intuitively imagine without understanding Lenz Law and eddy currents.

[tinman]

Tau has no bearing on whether current can/will flow or not. The effect it has is how "curvy" the rise of current is, relative to the timing of your test. With an infinite tau, the curve is going to be a straight line, not only because the time is infinite, but also because the beginning part of the curve is almost straight anyway.

Poynt.




Brad

[tinman]

Tau has no bearing on whether current can/will flow or not. The effect it has is how "curvy" the rise of current is, relative to the timing of your test. With an infinite tau, the curve is going to be a straight line, not only because the time is infinite, but also because the beginning part of the curve is almost straight anyway.

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