Question for EEs

[JohnCU]

Why does a current-carrying wire produce a magnetic field around it? I know how, but I can't find why. Or is it just something that happens?

 

[PottedMeat]

hmm quick explanation: moving charges create magnetic fields ( right hand rule for electrons i think ) the more charges moving, the stronger the field

 

[JohnCU]

Yes, but WHY?

 

[HonkeyDonk]

Originally posted by: JohnCU
Yes, but WHY?

he just explained why (albeit a quick/simple version).

Q: Why do current-carrying wires create a magnetic field around them?

A: Because moving charges create magnetic fields ( right hand rule for electrons i think ) the more charges moving, the stronger the field (taken from post above).

 

[JohnCU]

I know that, but why do moving charges create magnetic fields?

 

[dighn]

.

 

[Ameesh]

Originally posted by: JohnCU
I know that, but why do moving charges create magnetic fields?

well my understanding is that an electron has a electrical interia asscoaited with it. When a force is applied to the electron to move it the magentic field is induced. hence the electrostatic inertia of the electron is whats causing the field to be created.

 

[daveshel]

Because EMF is transmitted through air, although the air is a slower meduim than the wire.

 

[DanTMWTMP]

ehehe it justhappens. donno..

just look @ the amphere's law.
it just..happens. it fits in that eqn heh.

as to what really causes it? donno i was never really exposed to that. All i knw is, that that involves quantum and particle physics.

(theoretical massless particles, quarks, neutrinos, muons, ..blah etc etc... stuff you see on discovery channel once in awhile hehe)

I think it has yet to be really solved as to what really creates it?
who wants a nobel prize? whoever can figure it out will get one

 

[otispunkmeyer]

you could go on forever asking why....the first guys answer was completely acceptable, infact that answer is above A-level (thats yrs 12 and 13 in the UK, first year uni is 14)

google it if u really wanna know, there'll be some scientific paper floating about. i found one on rail guns....damn good read

 

[SagaLore]

An even better question that is related, why is there gravity? That hasn't been solved either.

 

[Eli]

Originally posted by: SagaLore
An even better question that is related, why is there gravity? That hasn't been solved either.

Weird.....

:Q

And we think we're so advanced, lol.